blue wezza

After I have got rid of all the aa guns and met up with the 505th Airborne,
where you need to protect him.

I stand next to him (behind where the tank ends up) and I kill the Germans
who come near, but there seem to be two more behind the tank so I move
around and when i do the liutenant moves backwards and is shot by the tank.

Anyone got any good tips/strategies for doing this section please?

TIA Wes