During the course of the US-led occupation of Iraq, Baquba emerged as the scene of some of the heaviest guerrilla activity, along with the Sunni enclaves of Fallujah and Ramadi. It was the site of the heaviest fighting during the June 24, 2004, insurgent offensive. Al-Tawhid Wal-Jihad, led by Abu Musab al-Zarqawi, took responsibility for the attacks.