sentences:  On 21 June, a joint Iraqi-American operation was under way near Hilla to capture or kill members of Moktada al-Sadr's Mahdi Army.Iraqi Special Forces raided Sadr City and captured a "key insurgent leader" on 20 June, along with two associates.Numerous smaller operations had also been conducted against insurgents, which included attacks on retreating insurgent forces from Baquba in the town of Khalis and other insurgents targets throughout Diyala province.