Girls und Panzer.
Girls and Tanks.
It's a very simple concept, but in the culture of mecha musume and moe anthropomorphism, where practically anything can be turned into a cute girl (or boy), there are many ways to execute on it.
Girls und Panzer knows this, and spends much of the first two episodes showing just which path they're taking on the long, glorious (?) road of associating armored warfare with underage schoolgirls.
[Please note - It may be hard for me to talk about this without coming across as some kind of person with conservative views on gender politics. Not true at all!]