The Bush administration plans to promote two military commanders who have led the US occupation of Iraq. General David Petraeus would be promoted from US commander in Iraq to head all US military operations in the Middle East. Petraeus would be replaced by Lt. General Raymond Odierno, his former deputy. Admiral William Fallon resigned as the top US commander in the Middle East in March over his apparent differences with the Bush administration on threatening Iran and boosting troop levels in Iraq.