After blowing up all three enemy tanks

meet up with the friendly forces at the intersection in front of the bank.
After receiving the new instructions go around to the side of the bank, wait for two of your teammates to cover you with fire, then immediately follow another teammate and sprint to the back of the bank. After the two men work together get inside the bank without any problems, use your knife when you are sneaked up on by an enemy, and when you get out of here there is an enemy outside with his back to you, which you can also take out with your knife or not, as you will definitely be spotted by other enemies anyway. Kill all the enemies outside, mainly those on the upper floors, and then go to the stairs between the first and first floors and kill the remaining enemies on the ground floor and the friendly forces outside the bank