volkanbadem
Chieftain
When your city is under siege, if there are mounted units ie. horse achers in the stack around the city the B.elephants have the chance to attack rather than wait in the city. Attacking gives more promotion points than defending and they prevent horse archers from flanking so that not let your catapults get damaged. I think the addition is not that bad. Occasionally you need to defend during the war. Building roads around the city will help them withdrawing after the attack.