From: east coast, usa
the Texas - Mexican War of 1836
I'm not familiar with that but took a quick look on Wiki, seems like a couple thousand from both sides involved for a couple of months.
The Mex-Am War was 1846-48, and a bigger affair. But as an historical simulation not much fun. Maybe it could be a game, but I'm no Avalon Hill. I did copy their Veracruz game to TOAW, but didn't seem as much fun as the original board game. I also did a Mex-Am scenario for TOAW [map seen below]. Neither ever saw the light of day. They just weren't much fun, no challenge. The Mexicans were big on training their peasant army to wear flashy uniforms and march around, but their equipment and combat training were terrible. They would more often run away when challenged. On the other hand the US had an 'army' of small groups of hardened frontiersman who weren't even scared of bears or 'wild savage injuns'. Plus, engagements ranged from 20,000 soldiers to a handful of men taking all of California. What a design mess!