A simple game of tactical warfare in World War I and World War II. There are four scenarios: August 1914, 1917 assault on a trench line, 1940 attack on French position, and Pacific jungle warfare. "Each counter represents one man. The time scale, while not exact, represents approximately one minute. There is no exact ground scale. The entire game was fudged until it represented the type of warfare that actually existed during the scenarios." PBI was British military slang for "Poor Bloody Infantry". 238 Counters (which includes 56 blank counters - 28 yellow; 28 red)