As infantry units advanced across Europe the only support they could rely on from day to day was that provided by the heavy weapons of their own units. While thundering tanks struck fear into the hearts of their enemies, it was the machine guns, mortars, and light cannon that proved to be most important, causing the majority of casualties suffered during World War II. Focusing on the US, British, German, and Soviet troops, this title offers a comprehensive guide to infantry fire support tactics used through World War II.