The Champagne offensive is still going on the Western Front without any side gaining a decisive advantage. In the Caucasus, Enver Pasha is showing how far he's willing to go to achieve his goals. Against his military advisors’ recommendations, he decides to send more and more troops to Sarikamish. Without supplies and with temperatures constantly below -20 degrees, thousands of Ottoman soldiers freeze to death before even reaching the frontline. When the Russians finally encircle the Ottoman troops, defeat is inevitable.

The Austro-Hungarian army resembles a better militia after six months into the war. The defeats against Serbia and Russia and still under siege in Galicia - the forces are in dire straits. Many casualties, especially among the officers, mean that an effective warfare is impossible. And all this while the Russians are close to entering the Hungarian plains. On another front, the Rtussians are winning the battle of Sarikamish which ends in a disaster for the Ottoman Empire. On the Western Front, each side still tries to gain a decisive advantage.

French general Joseph Joffre is stuck in a dilemma: the Champagne offensive has been going on for weeks now - without any of the expected results. Should he dig in and tolerate the enemy on French soil? Or should his soldiers continue to run up against the impenetrable German defences? Meanwhile, South African troops attack German South West Africa and in London, Winston Churchill's plan for an invasion of the Dardanelles has been approved.

For a decisive advantage on the Western Front, the military commanders of both sides are trying to use technological advances. And so this week, German Zeppelins are flying their first air raids on English towns. Winston Churchill is outlining his ideas for what would later become the tank. Meanwhile at the Western Front, the soldier Adolf Hitler is thinking about how this war is going to continue.

Konrad von Hötzendorf has to prevent the Russian army from entering the Hungarian plains. He starts a huge offensive in the Carpathian Mountains - in mid winter. He also wants to demonstrate his power to Italy and Romania who are considering entering the war for the Entente. Meanwhile, in the North Sea the first Battle of Dogger Bank takes place which leads to the sinking of the German ship SMS Blücher.

After more than 6 months of stalemate, the German Empire is playing two new cards to gain a decisive advantage. On the Eastern Front, the Germans use gas on a huge scale for the first time. While the attack fails, the foundation for gas warfare is laid. At the same time Kaiser Wilhelm II agrees to unrestricted submarine warfare – any ship can be sank at any time.

This week, well over 1 million soldiers are on the advance everywhere in Europe. General Hindenburgs tries to beat the Russians once and for all at the Masurian Lakes. Austria-Hungary is fighting the Russians with German support in the Carpathian mountains and on the Western Front the Champagne offensive is still going.

After more than six months of war, the first big mutiny breaks out in Singapore. The endless battles in which big powers sacrifice thousands of soldiers are leading to an organised resistance for the first time. Indian troops refuse to board a ship because they don't want to fight other muslims in the Middle East. Meanwhile, Paul von Hindenburg encircles the Russians on the Eastern Front and they almost suffer a defeat as they did in Tannenberg 1914.

To break up the stalemate and get a decisive advantage, France and Great Britain open up yet another theatre of war in the Dardanelles. The plan is to seize the strait and open eventually open up the Bosporus in order to ship supplies to the Eastern and Balkan front. And so begins the naval bombardment of ottoman forts as prelude to a big offensive which will we know to today as Gallipoli.

Modern war already took place in the sky and under water but the waring nations also wanted to gain an advantage in the trenches. So this week, we see the first use of another merciless invention on the battlefield: the flame thrower. The battles on the Western Front, in the Carpathian's and near the Dardanelles continued nonetheless.

The British Expeditionary Forces are starting their first major offensive since the beginning of trench warfare. Near Neuve-Chapelle they attack the Germans and try to "bite and hold" their position. This battle will be the blueprint for future British offensives. On the Balkan, Serbia is facing a different enemy: Typhus. The catastrophic sanitary conditions enable the disease to spread across the whole country.

Even though the Entente offensive near Constantinople didn't really take off yet, the allied powers were already dreaming about splitting up the Ottoman Empire between themselves - and even promised territory to other nations. In the meantime, Austria-Hungary started its third offensive in the Carpathians to free the besieged army in Galicia.

The generals at the Western Front are slowly starting to adapt to the modern war. The battle of Neuve-Chappelle will be a blueprint for future operations and further improvements are supposed to finally bring the decisive advantage. In the meantime, after 133 days, the fortress of Przemyśl capitulates - the longest siege of World War 1.

The Ottoman Navy is finally able to fend off the Russian and Royal Navies in the Dardanelles, Bulgaria is considering joining the Central Powers, Austria-Hungary is fighting off the Russians in Galicia and the German start a new offensive in the Baltics. All in one busy week of spring 1915.

The leaders of the Ottoman Empire are looking for a scapegoat after their collosal defeat in the Caucasian Mountains a few month earlier. They start the systematic relocation and disarm Armenian troops among their ranks to end all calls for Armenian independence. Today's estimates place the death toll of the genocide up till 1.5 million men, women and children.

This week, generals on three different fronts show that they are not able to realise their mistakes. Basra falls to the British, the quick victory at the Dardanelles is getting more and more unlikely and the Russians are loosing their advantage in the Carpathians. But not the commanders have to pay the price for their mistakes, the soldiers have to.

fter experiments on the Eastern Front, the German Army is using poison gas for the first time on the Western Front. At the beginning of the 2nd Battle of Ypres, the wind blows in a favourable direction; the wide spread use of chlorine gas has a devastating effect on the French troops. Even the Germans are surprised by it. The incredible sacrifice of the Canadian troops make it possible to defend Hill 60 in the end.

Completely underestimating the Ottoman army at the Dardanelles, the British commanders decide to let the ANZACs take the Gallipoli peninsular as a gateway to the Bosporus and Constantinople. After the landing in ANZAC Cove and on Z Beach one thing comes clear though: Mustafa Kemal and his troops will fight for every inch of this piece of rock.

Ignoring the warnings and cruising carelessly slow the RMS Lusitania is hit by a torpedo of the German U-Boat U20. Almost 2000 people die during the sinking of the Lusitania. At the same time the German and Austro-Hungarian army start a combined surprise offensive in the Carpathians. The Gorlice-Tarnów Offensive is a huge success for German commander August von Mackensen.

The 2nd Battle of Ypres is still going but no side can gain a decisive advantage. The main reason on the British side is a lack of artillery ammunition. Even the delivered shells are not working correctly. But even the German supply lines are stretched thin. At the same time German South-West Africa falls to South African troops under Louis Botha.

The big success of the Gallipoli Campaign never came, thousands of soldiers died and so Winston Churchill is forced to resign. At the same time August von Mackensen is pushing back the Russians and forcing them to hide in Przemyśl fortress - the same fortress they just conquered from the Austro-Hungarians a few weeks earlier.

After the defeats of Austria-Hungary against Russia, Italy is seeing her chance to grab disputed territories from them. Even though they are not prepared for a full scale war economically or militarily, the declare war against the Central Powers. So, just one month after the landing at Gallipoli, yet another front is opened in Europe. Meanwhile the Russians are still on the run from August von Mackensen and in Gallipoli the fighting stops to collect the dead.

When Przemysl falls for the 2nd time and when the British and ANZAC troops fail at Gallipoli again, one thing becomes clear: Artillery is the key for future battles. August von Mackensen had used it with great success at the Gorlice-Tarnow-Offensive and the French even diverted one million men to shell factories. Meanwhile German Zeppelins bombed London and the US sent submarines for aid.

Reginald Warneford is important to Britain's war effort. Not just because he shot down a German zeppelin, but because he is made a hero in times when heroes are needed. He receives a Victoria Cross soon after his victory because the commanders know about the average life span of pilots in World War 1. Meanwhile, the Austro-Hungarian army digs into the alpine rocks to fend of the Italian Attackers and Gallipoli continues to be a butchery without any progress.

The war seems like a romantic novel this week: In the East the Russians are saved by Cossack Cavalry while August von Mackensen's artillery is plowing through Galicia. In the meantime, the British discover a German spy ring in London and the French gain a few miles in the west.

Just a few weeks ago Austria-Hungary's military laid in shambles. But with German support from August von Mackensen and other German generals, the tide is turning on the Eastern Front. Even Lemberg can be conquered again and the Russians are still on their Big Retreat.

Two months after landing in Gallipoli the fight has become a trench warfare. In Mesopotamia British troops were losing the optimism, they had felt just a few weeks ago. The change of seasons brought more heat, turning the weather from bearable to excruciating. Heat became a deadly foe. While the German crown prince Wilhelm unsuccessfully tried to break through the Western front in the Ardennes, the Austro-German force managed to drive back the Russians in the East.

The Great Retreat of the Russians during the last weeks has shown one thing: Artillery is the key to success. More specifically, a new kind of artillery tactic called the artillery barrage which focuses shelling on one part of the front. August von Mackensen had actually stolen this approach from John French. The Entente tried to use it on the Western Front a few months earlier without the expected breakthrough.

The German-Austrian offensive on the Eastern Front had undone all of Russia's territorial gains in the last weeks. Lemberg had fallen and the German troops were at the gates of Warsaw. The Russian casualties were in the millions, especially equipment and officers were becoming scarce. And exactly now, the German high command (OHL) prepared an all-out offensive along the entire frontline. At the same time in Gallipoli, one failure followed the other. How long would the Entente be able to continue this exercise in butchery?

This week Russia premieres her tactics of „Scorched Earth“. A new strategy of burning their own land is to avoid enemies profiting from their conquests. Russia had been retreating from the German and Austro-Hungarian armies for nearly three months now. Continuously losing huge areas of land and hundreds of thousands of men on the Eastern Front. As a consequence, millions of civilians had to flee their homes. At the same time allied troops at Gallipoli are weakened by infections and disease due to lack of hygiene and heat while Italy repeatedly failed to take out Austrian strongpoints.

After Russia's Great Retreat and the defeat on the Eastern Front, the Russian Army is demoralized and even revolution is in the air. Germany is fanning the revolutionary flames by sending Bolshevik prisoners of war back to Russia - equipped with money to support the Bolshevik cause. Meanwhile, the the war is continuing on the Western Front. Even small skirmishes are turning into atrocious battles with little gain for either side. A great offensive is not in sight.

Another 20.000 soldiers fresh from the barracks are supposed to turn the tide at Gallipoli. But Mustafa Kemal is an Ottoman commander to be reckoned with. With a tactical ruse and the right timing, he surprises the inexperienced ANZAC recruits with a bayonet charge. As the sand of Chunuk Bair turns red, one thing is clear, Gallipoli is still not taken. On the Eastern Front the Germans lay siege on Kovno and are about to encircle the Russian troops near Brest-Litovsk. The German offensive on the Western Front is not nearly as successful though.

he Entente was in desperate need of American supplies and so the German submarine campaign in the Atlantic was a real problem. The British started to run false flag operations with so called Q-Ships to hunt down U-Boats which lead to the so called Baralong Incident this week. In the meantime, Russia was standing up against the wall as the fortresses of Kovno and Novogeorgievsk were falling to the Germans leading to a catastrophic loss in men, equipment and supplies.

Peter Hart described the state of the Gallipoli campaign in 1915 as "lunatic persistence in the face of the obvious" - and the Battle of Hill 60 proved just that. Outgunned and with a lack of artillery support, the battle was one of the bloodiest days on the peninsular near Constantinople. The Ottoman capital was still out of reach for the Entente to capture. Meanwhile, the war spread to the Indian border region and on the Western and Eastern Front the carnage continued in the air and on ground.

The Western Front has been relatively quiet the whole summer while the Russians were on their Big Retreat. The French and British generals have been busy trying to find a new strategy to overcome the stalemate. The Germans weren't sitting idle while awaiting the next big French offensive, they fortified their positions even using concrete. At the same time in the East, Tsar Nicholas II personally takes over military command and fires Grand Duke Nicholas Nikolaevich for the catastrophic casualties the Russian Army faced this summer. But his timing could not be worse.

While the Socialist movement gathers in Switzerland and calls for peace on the Western Front, on the Eastern Front and the Balkans the signs are set for the opposite: An escalation with new offensives. The French and British want to attack near Artois and in the Champagne, Germany wants to finish the war weary Russian Army. At the same time Bulgaria agrees to attack Serbia within the next 30 days. Even in London the war can still be felt when German Zeppelins continue to drop bombs on the British capital.

This week Indy dissects a contemporary source from autumn 1915 - the Hobart Mercury Newspaper from Australia. While the French and British prepare a new offensive on the Western Front, their Entente ally Russia is still suffering in the East when Germany is moving on the last big Russian city of Vilnius. Even though the propaganda says otherwise, the situation for the ANZACs in Gallipoli still looks grim.

When the Germans take Vilnius, they set their plans of "germanizing" the whole area into motion. Erich Ludendorff believes that Courland and other areas near East Prussia are culturally German and that he's returning them to the Fatherland. While the Russian Army is now in a much better defensive position after their Great Retreat, civil unrest across the country is becoming a problem. Huge losses and the difficult supply situation are making it difficult to maintain order. At the same time, Bulgaria is mobilizing her troops, foreshadowing yet another front in this World War.

After weeks of preparation the French and British Armies unleash a new offensive on the Western Front. Not only is it supposed to relieve pressure on the Russians on the Eastern Front but the Entente wants to achieve the decisive breakthrough. The French actually break through German trenches only to realise that they have a second line of trenches completely in tact right behind the first line. The British attack at Loos also turns into carnage even though the British use gas for the first time.

The Central Powers want to open a direct supply connection between Berlin and Constantinople. So, they start a new offensive on Serbia to defeat them once and for all. It's an open secret that Serbias neighbour Bulgaria will soon join the war so the Serbians are in dire need of help. With no other option, the Entente lands troops in Salonika, Greece. The whole situation on the Balkans is sprialing out of controle once more. Meanwhile the new offensives on the Western Front continue while the Eastern Front cools down.

By the numbers the Battle of Loos was a defeat for the British Army but they learned valuable lessons for the future on the Western Front. The creeping artillery barrage is used for the first time successfully and it is apparent that assault tactics have to be rethought completely. On the Balkans, Bulgaria officially declares war on Serbia and joins the Central Powers Germany, Austria-Hungary and the Ottoman Empire. On the same day they invade Serbia which is now in real trouble.

Edith Cavell was a British nurse serving in a nursing school in occupied Belgium. She was executed by the Germans for treason and espionage in Brussels. Her death and the surrounding atrocity propaganda caused a public outcry all over the world. At the same time the First World War continued like never before. The Third Battle of the Isonzo didn't bring a decision between Austria-Hungary and Italy, in Gallipoli the troops were slowly withdrawn and the the Champagne offensive of the French army was still in full swing.

After the Great Retreat during the summer, the Russians are finally able to fight back the Germans at Dvinsk. With a new type of trench warfare, they are able to render August von Mackensen's artillery useless and only take on small numbers of Germans at the same time. The German army is successful in Serbia though and so the situation for the Serbs looks grim. Meanwhile Benito Mussolini writes in his diary that the worst enemy is not Austria-Hungary, but lice. All of the soldiers and generals know one thing: Winter is coming.

For the third time the Italians had tried to conquer the Austrian positions at the Isonzo front and for the third time they had failed. And like the other defeats before, the Third Battle of the Isonzo came with an extreme amount of casualties due to the difficult terrain in the Alps. At the same time, Lord Kitchener visits the front in Gallipoli and realises that evacuation is the only logical decision to make. On the Western Front, the French had suffered well over 200.000 casualties during the autumn offensives at Artois and in the Champagne.

erbia's Army cannot hold out much longer against the invasion of the Central Powers. Germany, Austria-Hungary and Bulgaria are relentlessly pushing forward through the Balkan country. The French are trying to help from the south but a river proves to be an obstacle they cannot overcome. In the Alps, the 4th Battle of the Isonzo starts one week after the 3rd had failed and in West Africa, the Battle of Banjo takes place as one of the last battles of the German colony Kamerun (Cameroon).

12 war zones were not enough for this global war and this week an often forgotten theatre of war opens in Libya. Local Arab tribesmen fight against the British in guerrilla war. As if the Italians did not have enough problems at the Isonzo Front where Luigi Cardona is still sending his men into certain death against the Austrian defences. The situation for the Serbs is grim too and on the Western Front the carnage continues unchanged.

Far away from the Western Front, the British Indian Army gets intro trouble in Mesopotamia against the Ottoman Empire. In the Alps, the Fourth Battle of the Isonzo is proving just as disastrous to the Italians the other three before. And in Serbia the situation is getting darker and darker as Nis is falling to the Central Powers. All while the flying aces of World War 1 are fighting it out in the skies over the Western Front.

Serbia's last stand is over and the remaining forces and civilians have to leave their home country across the inhabitable trails of the Albanian Alps. So, a whole nation is on the run while their enemies celebrate their successful military operation. The German Army is gladly relocating the much needed troops to other fronts while they leave the Austrians and Bulgarians to deal with the new situation on the Balkans.

Serbia is breaking under the pressure of the Central Power invasion and the last troops and civilians flee through the Alps. The final decision to evacuate Gallipoli is made and the British Indian Army gets under siege in the town of Kut Al Amara in Mesopotamia. The end of 1915 certainly looked grim for the Entente. The morale in Italy was also at a low point after the Fourth Battle of the Isonzo river ended like the three before.

The morale of the Italian Army at the Isonzo Front is on an all time low. Catastrophic defeats against the Austrians, bad and broken equipment, unsanitary conditions, no supplies, no front leave and recreation for the soldiers. This week the first troops under Luigi Cardona are mutinying. At the same time the Entente is in real trouble against Bulgaria on the Macedonian Front and the evacuation of Gallipoli is still in the planning phase.

While the Western and Eastern Front freeze over and the armies there have to fight the harsh conditions as much as the fight the enemy, the evacuation of Gallipoli is set into motion. After months of stalemate, the disease ridden offensive is finally called off. Unlike the rest of the operations there, the evacuation is actually following a thorough plan.

1915 was a year for the Central Powers except on the Western Front where the stalemate continues. But plans are being made on both sides to gain an advantage. Preparations for huge offensives are on the way and one French fortress is the focus of the German Army: Verdun.