Infantry are very versatile out on the battlefield. They can go through most forms of terrain, search buildings, hold ground, and be armed with many different weapons in order to take on a variety of enemy formations. When enemy vehicles bear down, it's time for the heavy weapons crews to step up and protect the rest of the platoon.
From the post:
The Soviets were quick to equip their East German ally with the powerful AT-4 Spigot anti-tank missile, their AGS-17 automatic grenade launcher and the SA-14 Gremlin anti-aircraft missile in an attempt to give them an unbeatable edge in firepower.Source