Yo guys I have a neat sort of contest idea

You guys could make your own modular WW2 vehicle, it could be an APC, Tank, Boat, as long as it seems like it could exist during WW2 (even in plans/as a prototype) it’s fine, though it needs a hull and at least 2 attachments/uses or something not sure how to word this, so say a Halftrack with a hull and a Mortar component maybe also a T34 Calliope Missile Launcher?

*the contest sort of thing has been edited so that any timeframe with war vehicles can be used, so like from WW1 to the future (for example there wasn’t any Stone Age vehicles, so I can’t really include the Stone Age)