三名有志的宇宙青年，投效軍隊，保衛人類。強尼加入了機動部隊，黛絲加入飛行行列，亞斯則選擇了政戰小組，三個人在不同的崗位上，一起奮戰，互相支持與鼓勵。 當外星昆蟲大舉破壞生存地時，他們紛紛投入戰局，特別是機動部隊的強尼，打的可是與外星昆蟲面對面的內搏戰，與外星昆蟲相較起來，人類的行動太遲緩，著實敵不過行動迅雷為數眾多的外星昆蟲…… 正當地面上的強尼強撐打鬥時，黛絲跟著他的宇宙船，終於在最後關頭接應，使得地面機動部隊終於可以鬆一口氣…… 可是武力並不是解決外星昆蟲的有效辦法，他們必須設法找到那個「腦」，那個有智慧，能夠預知人類行為模式、會吸食人腦的怪物，必須想辦法找出它藏身的地方，捉到牠，才真能一勞永逸……
托普哈里是海軍一名優秀的飛行員，他因不服上級指示而遭解職，且因為父親的陰影，在駕駛飛機時，哈里的情緒並不是很穩定，一不小心便會出狀況。由於這一點，布拉克少校找哈里來參加一項名為「睡臭鼠」的計畫，因為布拉克和戰技顧問威爾森串通，希望任務失敗。而哈里便是相當適合的人選。哈里到隊上時，認識了一美麗女子蕾瑪拉，兩人互有好感。蕾瑪拉是精神治療師，她了解哈里的狀況，知道他不適合飛行，也因此她發覺事有蹊蹺，但她仍鼓勵哈里全力完成任務，克服心中的障礙。後來當哈里和隊友們正式執行任務時，由於飛機早已被威爾斯派人動過手腳，全隊頓時陷入危機。這時哈里卻仍陷在父親過去的陰影，精神無法集中。直到布拉克打開他的心結，哈里才豁然開朗，打起精神援助了隊友，並成功地完成了任務。最後並圓滿地和蕾瑪拉快樂的在一起，享受倆人甜蜜的生活。
In response to political pressure from Senator Lillian DeHaven, the U.S. Navy begins a program that would allow for the eventual integration of women into its services. The program begins with a single trial candidate, Lieutenant Jordan O'Neil, who is chosen specifically for her femininity. O'Neil enters the grueling training program under the command of Master Chief John James Urgayle, who unfairly pushes O'Neil until her determination wins his respect.
Inspired by the true story of Greg Yance. In the film, Yance (Epps) is a hood who goes to jail for possession of drugs. He is given a choice: 5 years in jail or a couple of months in boot camp. He chooses boot camp and finds out it is tougher than he thought it would be. He braves it through and comes home a better man. He then has to deal with the real world, and never gives up no matter what the odds.
A Marine Corps drill instructor who is disgusted by the fact that the Corps now accepts draftees finds himself pitted against a hippie who has been drafted but refuses to accept the military's way of doing things.
Gunnery Sergeant Jim Moore is one of the toughest Drill Instructors on Parris Island. But he's got a thorn in his side: Pvt. Owens, who always seems to foul up when the pressure's on. Convinced that "there's a man underneath that baby powder," Sgt. Moore drives Owens to the point of desertion. Making things worse, Capt. Anderson has given Moore three days to make the scared private into Marine material, "or I'll personally cut the lace off his panties and ship him out!" Adding to the pressure, Moore also juggles a budding romance with a shop girl.
The station-master Fabian Bom is a very meticulous person, and he makes sure that the trains leaves exactly - on the second. To him, nothing could be more important than duty, efficiency and punctuality, in fact, his sense of duty is clearly perverted. His beloved Plum-Plum, the major's daughter, is infatuated with army officers. To regain her attention, he joins the infantry. Bom becomes a soldier who loves the military training, long marches as well as hard labour as punishment. He meets Agnes, who falls madly in love with him.
The story of the life and career of football star Elroy "Crazylegs" Hirsch (who plays himself).
Sgt. Thorne Ryan, who once fought bravely in Korea, now serves as a hard-nosed drill instructor to new Army recruits at Fort Bliss, Texas. But is he really the man he is often described as? His fellow instructor, and friend helps him to face the ghosts of his past experiences in Korea. One night in a bar across the border in Juarez, Mexico, Sgt. Ryan meets a lady who begins to turn his life around. Will this be enough to help him deal with the past? Or will he continue to be so hard on his troops?