I dont have much knowledge about this tank stuff, but the Russians used T 90s in the Chechen war right? And some of them even survived multiple RPG hits. ( everything from wiki )By such logic, the only really modern tanks that were participating in full scale war also fighting with other tanks and armored vehicles and encountered modern anti tank weapons, would be M1A1/M1A2 series, Challenger 2 and Merkava Mk4... Other modern tanks were used only in some peace keeping operations and in environments where there are more mines than modern tani tank weapons (main difference between Iraq and Afghanistan, in Afghanistan there are actually not many anti tank weapons used, so even USMC seein bigger threat in IED's, deciced that their M1A1's in Afghanistan will get only C-IED belly armor, safe seats and IED jammers from TUSK kit, while side ERA tiles will not be used to not add additional weight, especially that as I said, no serious RPG/ATGM threat is seen there compared to Iraq).