Muv Luv Alternate: Total Eclipse
an anime series that follows from a alternate past into an alternate recent past, combining great CGI, an improved 'Gunparade March' style story.
Lots of blood and shooting sometimes occasionally graphically eaten humans so not for the young unless you pre-view them first, to make sure; most of the eating is done in the first few episodes, the DVD version do not have censoring 'shadows' hiding the more rare 'grusome' bits.
Depending on the cotton wool kids can be in, at least 16+ for conservatives, oh and there's only one hot springs scene near the end of the series, but their plug/pilot suits are like Evangelion, but less MOE than most anime.
Also covered are the effects of lesser nations peoples having to work with their respectiv coldwar masters in out of the woods places leads to some issues too.
Slice of military life test pilots, typical unrequited love triangles and character developments and mecha 'TSF' developments (that mirror some JSF stuff,) and political shenanigens too,
..the Soviets are still high kicking in this, and the Imperial Shogunate too, with some mild racism and stronger anti-racism and other difficult subjects like mixed and some, ..well, alot of beer drinking as the series progresses, also nationality parentage effects upon offspring and the loss of national homelands due to their populations being eaten by the BETA.
The Beings of the Extra Terrestrial origin which is Adversary of human race, are quite happy to eat anything that threatens them given a chance; the BETA were first spotted on Mars in 1958, they arrived on the Moon in 1967 and, after a brief conflict with humanity's space forces, invaded Earth in 1973.
They quickly spread from their landing point, Kashgar, and proceeded to invade the Eurasian, Middle Eastern and Asian regions; when they finally reached Japan in 1998, 36 million people were killed within a week. By 2001, the world population was down to about 1 billion people.
The BETA vary greatly in size, with the smallest identified strain (Soldier-class) being around 3 meters tall, and the largest identified strains (Fort-class) at over 60 meters tall. They cannot fly, and the Laser and Heavy Laser-class BETA shoot down anything that does, rendering aircraft useless and making any aerial military operations much more difficult.