Omar Hassan Ahmad al-Bashir is a Sudanese former military officer and politician who served as Sudan's head of state under various titles from 1989 until 2019, when he was deposed in a coup d'état. He was subsequently incarcerated, tried and convicted on multiple corruption charges. He came to power in 1989 when, as a brigadier general in the Sudanese Army, he led a group of officers in a military coup that ousted the democratically elected government of prime minister Sadiq al-Mahdi after it began negotiations with rebels in the south; he subsequently replaced President Ahmed al-Mirghani as head of state. He was elected three times as president in elections that have been under scrutiny for electoral fraud. In 1992, al-Bashir founded the National Congress Party, which remained the dominant political party in the country until 2019. In March 2009, al-Bashir became the first sitting head of state to be indicted by the International Criminal Court (ICC), for allegedly directing a campaign of mass killing, rape, and pillage against civilians in Darfur. On 11 February 2020, the Government of Sudan announced that it had agreed to hand over al-Bashir to the ICC for trial.

Sadiq al-Mahdi, also known as Sadiq as-Siddiq, was a Sudanese political and religious figure who was Prime Minister of Sudan from 1966 to 1967 and again from 1986 to 1989. He was head of the National Umma Party and Imam of the Ansar, a Sufi order that pledges allegiance to Muhammad Ahmad (1844–1885), who claimed to be the Mahdi, the messianic saviour of Islam.