The crisis began with a question that had hung over Zimbabwe for years: who would succeed Mugabe? By October 2017, the contest had narrowed to two factions within the ruling ZANU-PF party. Vice-President Emmerson Mnangagwa, a liberation-war veteran with deep ties to the military and intelligence services, represented the old guard. Grace Mugabe, the president's wife, led a younger faction called Generation 40 that sought to position her as Mugabe's heir. On 6 November, Mugabe fired Mnangagwa as vice-president. Mnangagwa fled to Mozambique and then South Africa, citing 'incessant threats' against his family. More than a hundred of his senior supporters were targeted for disciplinary sanctions by Grace Mugabe's allies. The purge triggered the very response it was meant to prevent.

On 13 November, army chief General Constantino Chiwenga -- freshly returned from an official visit to China where he had met senior Chinese generals -- warned publicly that the military could 'step in' to halt the party purges. Mugabe's government attempted to arrest Chiwenga upon his return, but police were turned back. On the evening of 14 November, armoured vehicles rolled into Harare. Soldiers seized the Zimbabwe Broadcasting Corporation and took up positions across the capital. The military placed Mugabe under house arrest at his Blue Roof mansion but maintained the fiction that he remained in charge. Finance Minister Ignatius Chombo and several other ministers aligned with Grace Mugabe were arrested. Acting President Phelekezela Mphoko, the second vice-president, technically held authority but exercised none of it.

On Saturday, 18 November, the people of Harare answered a question the generals could not resolve alone. Tens of thousands poured into the streets in what became a euphoric, peaceful demonstration -- not just in the capital but in cities and towns across the country. Crowds celebrated what they understood as the end of Mugabe's presidency, cheering the army and demanding that the old man go. Mugabe, however, refused. In a televised address on 19 November, he acknowledged nothing and resigned nothing, saying he would preside over the upcoming ZANU-PF congress. The party sacked him as leader and expelled Grace Mugabe and twenty of her associates. They gave him until noon on 20 November to resign. He ignored the deadline. On 21 November, Parliament convened impeachment proceedings. The motion was made by Senator Monica Mutsvangwa of ZANU-PF and seconded by James Maridadi of the opposition MDC-T -- a rare moment of cross-party unity. Before the committee could reach its verdict, Mugabe's resignation letter arrived. The session erupted.

Emmerson Mnangagwa was sworn in as president on 24 November 2017. He promised economic reform, re-engagement with the international community, and a break from the Mugabe era. South African President Jacob Zuma had phoned Mugabe during his house arrest and confirmed the situation; the African Union and Southern African Development Community called for constitutional process and restraint. The United States, United Kingdom, and European Union urged a return to democratic governance. Whether the transfer of power represented a genuine transition or merely the replacement of one liberation-era strongman with another became the defining question of Zimbabwean politics in the years that followed. The military had removed a ruler it helped install. The streets had celebrated a freedom whose shape remained undefined. In Harare, where the armoured vehicles had appeared without warning on a November evening, the answer was still unfolding.