The Challenger 2 is also equipped with a new version of the revolutionary Chobham armor. In one incident during Operation Iraqi Freedom, a Challenger 2 took over 70 hits from RPGs. Another incident involved the tank being hit on its normally-vulnerable underside with a RPG-29 and yet it still managed to drive back to base on its own power.
https://www.wearethemighty.com/mighty-tactical/challenger-2-slow-tank/

