M69 incendiary M69 incendiary The M69 incendiary bomblet was used in air raids on Japan and China during World War II. They were nicknamed "Tokyo calling cards". The M69 was a plain steel pipe with a hexagonal cross section in diameter and long. It weighed about . The bomblet used napalm (jelled gasoline) as an incendiary filler, improving on earlier designs which used thermite or magnesium fillers that burned more intensely, but were less energy- and weight-efficient, and were easier to extinguish. In Germany they were filled with jellied oil and dropped in clusters of 36 in the non-aerodynamic M19 bomb. Over
Protocol on Incendiary Weapons Protocol on Incendiary Weapons The Protocol on Prohibitions or Restrictions on the use of Incendiary Weapons is a United Nations treaty that restricts the use of incendiary weapons. It is Protocol III to the 1980 Convention on Certain Conventional Weapons. Concluded in 1981, it entered into force on 2 December 1983. , it has been adopted by 115 state parties. The protocol prohibits, in all circumstances, making the civilian population as such, individual civilians or civilian objects, the object of attack by any weapon or munition which is primarily designed to set fire to objects or to cause burn injury