Thanks McIvan! :thumbs_up:
"To me the assault is closing with the enemy with the intention of driving them from their position or destroying them in place, and occupying that position yourself. It is the intention of taking ground that makes the difference. That definition, I think, defines assaults between AFVs just as well as anything else."
It's a part of combat on the battle field. That and holding the ground formerly owned by the enemy, which was made possible by the enemy unit becoming combat ineffective?
I know that the message states "you have captured", but it is more that a unit or units are no longer capable of interdicting on the battle field.