Gordon L. Rottman 
World War II Infantry Fire Support Tactics [PDF ebook] 

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. Common principles were shared across units but the wide variety of weapons available to the different armies altered the way they were used in battle.
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. Combat reports are complemented by specially commissioned artwork to show the way in which tactics varied, and highlight how developments obliged opposing armies to review their own methods.