The Mahdist State was established in 1885 after the Siege of Khartoum. Muhammad Ahmad died shortly after this Mahdist victory and was buried at Omdurman. The Mahdist state was led by the Mahdī's successor, the Khalifa Abdullahi, until 1898 when an Anglo-Egyptian force, led by Lord Kitchener, defeated the Mahdists at the Battle of Omdurman. This victory marked the success of Kitchener's reconquest of Sudan. After the Battle, the Mahdī's tomb was seriously damaged by naval gunfire on Lord Kitchener's orders.