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The Mark 77 is a US 750-lb (340-kg) air-dropped incendiary bomb that carries 110 gallons (415 litres) of a fuel gel mix that is the direct successor to napalm.

Mk-77s were used by the US Marine Corps during the First Gulf War. Approximately 500 were dropped, reportedly mostly on Iraqi-constructed oil filled trenches. Thirty Mk-77s were also used in the 2003 invasion of Iraq.

Use of incendiary bombs against civilian populations was banned in the 1980 United Nations Convention on Certain Conventional Weapons. The US has not signed this agreement although they did retire use of napalm. The Mk-77 is the only incendiary bomb currently in use by the United States military. Another incendiary weapon - white phosphorus - is allegedly being used as an incendiary weapon in the current Iraq War. White phosphorus or 'Willie Pete' is used primarly as a smoke-screening agent. Only the US and Russia continue to invent and use gelled fuel bombs.