3.
the AI in big fights with reinforcements is imo broken. i have it set to 500 soldiers per match, so if you fight with 450 soldiers vs 500, there will be only 500 guys on the map and after time some more will respawn at the starting area. this results into making the ai fall back to their reinforcements and stack up there until you arrive. your and your allies units will then run after the enemy in small groups and get defeated by running into a 200 man army with only having 10 men at a time. you will still get reinforcements, but they only spawn in 10-20 man packs and run over the whole map just to be killed by the 200 man pack.