M69 incendiary

The M69 incendiary bomblet was used in air raids on Japan and China during World War II, including the firebombing of Tokyo in 1945.

[4] In Germany they were filled with jellied oil and dropped in clusters of 36 in the non-aerodynamic M19 bomb.

[6][7] Upon hitting a building or the ground, the timing fuze burned for three to five seconds and then a small explosive charge (black powder in the standard M-69 type deployed operationally during WW2, white phosphorus in a later modification, the M-69X, which did not see wide use) ignited and propelled the incendiary filling up to 100 feet (30 m) in several flaming globs, instantly starting intense fires.

[3] As they were very useful in China at Hankou,[9] the bombs were very effective in setting fire to Japanese civilian structures in mass firebombing raids starting in February 1945 against Kobe.

[10] In the first ten days of March 1945, raids with the M69 and M47,[11] extensive damage was done to Tokyo, to Nagoya, to Osaka, and to Kobe.