The book "Portable Flamethrower M2-2" by the United States War Department is a documentary publication that describes in detail the flamethrower adopted by the US Army. The book provides technical characteristics, the principle of operation, the history of the development and use of this weapon during military conflicts. The M2-2 portable flamethrower was considered one of the most effective means of supporting infantry in the fight against enemy weapons in the closest areas of the battlefield. This document can be useful for military historians, collectors of military equipment and anyone interested in military affairs.