Direct proof of use
The Mk-77 firebomb is directly documented in the 2003 Iraq War through U.S. and UK public accounts. In 2005, The Guardian reported a UK defence secretary correction that U.S. Marines had dropped 30 Mark 77 firebombs between 31 March and 2 April 2003 against military targets away from civilian areas. The report attributed the use to U.S. information later passed to the UK government after earlier denials.
A U.S. State Department International Information Programs response, archived by GlobalSecurity, separately stated that Mark-77 firebombs were used against enemy positions in 2003 while distinguishing that spring 2003 use from later allegations about Fallujah in November 2004. Contemporary San Diego Union-Tribune reporting, archived by Global Policy Forum, also recorded Marine pilots and commanders confirming firebomb drops during the Marine advance toward Baghdad.
Sources: Guardian Iraq Fire Bombs, USINFO Fallujah Illegal Weapons Response, San Diego Union-Tribune Firebombs
Timeline
The documented combat-use window in the later UK correction was 31 March through 2 April 2003, during the war-fighting phase of Operation Iraqi Freedom. The Guardian account said the 30 weapons were used by U.S. Marines against military targets away from civilian areas.
The same conflict-use trail includes earlier reporting from August 2003. That report said Marine Corps fighter pilots and commanders confirmed dropping incendiary bombs near bridge approaches over the Saddam Canal and the Tigris River as Marines moved toward Baghdad, and it described pre-positioned Mark 77 stocks unloaded in Kuwait before the war.
Sources: Guardian Iraq Fire Bombs, San Diego Union-Tribune Firebombs
Narrative
In this conflict, the sourced user was the U.S. Marine Corps within the United States and coalition side. The public record points to I Marine Expeditionary Force and Marine aviation, rather than Iraqi forces or later Iraqi security forces, as the documented operator.
The weapon's documented role was air-delivered incendiary attack against enemy positions and approaches during the opening campaign. The San Diego Union-Tribune account placed drops near bridge approaches over the Saddam Canal and the Tigris River, and the U.S. response characterized the 2003 employment as use against enemy positions. GlobalSecurity's Mk-77 background page describes the firebomb as a thin-skinned fuel-gel container for targets such as dug-in troops, supply installations, wooden structures, and convoys, helping explain the battlefield role without adding a separate target claim beyond the Iraq sources.
The cited public sources support confirmed spring 2003 Mk-77 use in Iraq but do not identify every aircraft sortie, full target list, individual impact point, or casualty count for the 30 weapons. They also separate the confirmed 2003 use from later Fallujah allegations, with the USINFO response saying no Mark-77 firebombs were used in Fallujah.
Sources: USINFO Fallujah Illegal Weapons Response, San Diego Union-Tribune Firebombs, GlobalSecurity MK-77 Fire Bomb
