[Mobhack]

infantry assault is troops getting close to the AFV - and may be attacks on the engine deck, tracks, or dropping a grenade inside the hatch etc.

Infantry assault is usually on side or top armour - never the front. Open topped AFV are horribly vulnerable to being swarmed.

Infantry assault is far more effective if the infantry are unseen by the enemy before the assault (AT ambush), highly skilled, low supression, and if the infantry have less distance to travel to the AFV, and if they have some form of AT weapon (hand grenades will do for very light or open top armour).

cheers
Andy