 If you liked
Girls & Panzer
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 ...then you might like
Gundam Build Fighters
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Both use a aspect of warfare and turn it into a fun sport and sometimes goes into the fine details of the tools at hand. For one, it's knowledge of tanks in WWII, for the other, Mobile Suits and other items from the giant Gundam Franchise(s). They both have MCs who are soon aiming to be the best at their sport. Each sometimes uses clever tactics to try and get a advantage, with varying results. They also both have a quirky sense of humor (Humliating costumes for defeat in one, while the other has tsundre-style flirting mid-battle and other Gundam Jokes).