From the publisher:

Battlegroup Panzer-Grenadier rules are designed to cover WW2 engagements ranging from small company combats to Battlegroup level actions. The rules aim to reproduce the challenges presented by tactical combat throughout the 1939-45 war, while also permitting the use of the vast array of vehicles and equipment that supported the infantryman throughout the conflict.The basic game tactical unit is therefore the infantry section or squad supported by armoured fighting vehicles, artillery and ground attack aircraft.The rules are written for use with 15mm or 20mm figures, though should work perfectly well for smaller scales.