1974 - 1981 actually.In a modern ground battle, the tanks will be deployed forward with infantry following closely behind them.
The mission of the tanks is to take out enemy tanks and field guns.
The mission of the infantry is to protect the tanks from other disbursed skirmishing infantry.
If you cannot pop the top of the infantry vehicle then it is not much good for anything. Then it might as well be a taxi cab.
Did you learn military theory during WW2?
Were you born yet?