Sailor Fuku to Juusensha

Sailor Fuku to Juusensha (セーラー服と重戦車, lit. "Sailor Uniform and Tank") is a manga written and illustrated by Nogami Takeshi.

Plot
Shimada Kanon aims to be the strongest tank crew in the Kantou region. With her best friends Mariko Mutsumi, and their World War II-era, Panther V, they form the Nora Middle School Tank Crew. Unfortunately, as they have no sponsor to fund their effort, their dream is still just that. However, a chance to make a name for themselves arrives when delinquents come knocking on their school's door riding T-55s...