Urban Guerrilla» was the term that the left wing terrorists of German called themselves. The term «Urban Guerrilla" was coined to contrast with the firmly established concept of rural guerrillas whose style of warfare had been utilized for centuries by groups as diverse as the American forces in the Revolutionary War and Chairman Mao's forces in the 1930s. The difference was that urban guerrillas were to take their wars out of the jungles and mountains, and bring it directly to the population centers.