Incendiary bombs were developed during World War I, coinciding with the advent of air vehicles in warfare. They were likely descended from a much longer tradition of fire weapons used in sieges and naval combat.
German forces dropped thickened fuel bombs from zeppelins on cities beginning in 1915. Both sides would later develop bombs using metallic substances such as thermite and magnesium alloys that burn at very high temperatures and are difficult to extinguish. The light weight of incendiary devices also made them favorable compared to high explosive bombs.
The cities of Dresden and Tokyo were devastated by incendiary bombing during World War II. The United States used incendiary bombs filled with napalm as late as the Vietnam War, and kerosene bombs as late as the 2003 Iraq War.
Creates a wall of fire
The Incendiary Bomb is featured in Battlefield 1 as the primary weapon of bombers using the Firestorm Package. A group of nine bombs is dropped in a line, forming a wall of flame that can temporarily block infantry movement, or saturate an objective or defensive position. Each individual bomb is comparable to an Incendiary Grenade in power and reach.