Zanzibar's ethnic landscape in 1964 was a product of centuries of Indian Ocean contact. The archipelago's majority African population coexisted with roughly 50,000 Arabs and 20,000 South Asians, communities whose roots on the islands went back generations through trade, settlement, and intermarriage. Under British protection since 1890, the islands had been governed through structures that favored the Arab minority -- a legacy of Zanzibar's history as an Omani territory. The Arab community generally had better access to education and healthcare. As independence approached in the early 1960s, political parties organized largely along ethnic lines: Arabs dominated the Zanzibar Nationalist Party, while Africans supported the Afro-Shirazi Party. In the July 1963 election, just months before independence, the ASP won a majority of votes but -- due to the layout of constituencies -- failed to win a majority of seats. That gap between popular support and political power became a fuse.

The planning was Okello's, carried out largely without the knowledge of ASP leadership. He recruited mainly from the African communities on Unguja, arming them with what was available -- hunting rifles, knives, machetes. The police stations fell quickly; the Arab officers who had recently replaced experienced personnel were poorly trained and could not mount an effective defense. By 7:00 AM, Okello was broadcasting from the captured radio station, calling on Africans to rise up. The Sultan's palace was seized. The government collapsed. What followed in the streets of Stone Town and across the island went far beyond political overthrow. Insurgents looted and destroyed shops and homes owned by Arabs and South Asians. Arab and South Asian civilians were targeted for robbery, assault, rape, and murder. The violence was systematic in some areas, chaotic in others, and catastrophic for the Arab and South Asian communities who bore its full weight.

The death toll of the Zanzibar Revolution remains disputed decades later. Estimates range from several hundred to 20,000, a gap that reflects both the chaos of the violence and the political sensitivity of its accounting. What is documented: at least 80 people were killed and 200 injured in the initial 12 hours of fighting, the majority of them Arabs. In the days and weeks that followed, killings continued across the island. An estimated 10,000 people fled Zanzibar, many to the United Kingdom, leaving behind homes, businesses, and possessions that were immediately seized. By some estimates, a quarter of Zanzibar's Arab population was killed in the violence. The Indian and South Asian communities, though not the primary target, also suffered attacks, displacement, and loss. These were not abstractions -- they were families broken apart, livelihoods destroyed, lives taken from people whose roots on the island went back generations. The revolution addressed real grievances of political exclusion and inequality. The human cost of how it addressed them was borne overwhelmingly by civilians.

The revolution's aftermath played out against the backdrop of superpower competition. Western governments feared that Zanzibar's new leadership, under President Abeid Karume of the ASP, had communist sympathies. The British government drew up intervention plans, though it ultimately did not act because British and American citizens had been successfully evacuated. East Germany and the Soviet Union moved quickly to recognize the new government and offer support, as did China. The feared communist takeover never materialized. Instead, barely three months later, Zanzibar merged with mainland Tanganyika to form the United Republic of Tanzania in April 1964 -- a union that many historians believe was engineered partly to dilute Zanzibar's radical potential and bring the islands under the more moderate influence of Tanganyika's Julius Nyerere. Zanzibar retained semi-autonomous status within the new nation, a political arrangement that persists today.

The Zanzibar Revolution remains one of the most sensitive subjects in Tanzanian public life. For the African majority, it was a liberation from centuries of Arab political dominance and colonial-era inequities. For the Arab and South Asian communities, it was a catastrophe -- a mass displacement and killing that shattered their presence on the islands. Both things are true simultaneously. The revolution overthrew a system that excluded the majority from political power; the violence that accompanied it destroyed the lives of thousands of people whose only offense was their ethnicity. In Stone Town, the physical evidence is everywhere and nowhere. The grand Arab houses became government buildings. The Indian trading houses became party offices. The people who built them were killed, expelled, or absorbed into a new political order. Zanzibar's annual Revolution Day commemorations celebrate liberation. The memories of those who lost family members in the violence coexist, largely in private, with that official narrative.