Puzzle No. 40: When?

The United States Congress imposed sweeping economic sanctions on apartheid South Africa in 1986 by overriding President Ronald Reagan's veto on 2 October, a rare bipartisan repudiation of a sitting president's foreign policy. The Comprehensive Anti-Apartheid Act banned new American investment and bank loans, prohibited imports of South African products such as coal, steel, uranium, and agricultural goods, and cut air links, while setting conditions for lifting the measures that included releasing Nelson Mandela and repealing apartheid laws. Reagan had favoured "constructive engagement," but a coalition of Black lawmakers, anti-apartheid activists, university divestment campaigns, and Republicans defied him. The sanctions, joined by similar moves in the Commonwealth and Europe, deepened South Africa's economic isolation and capital flight through the late 1980s, adding external pressure that reinforced internal resistance. Historians debate how decisive the measures were, but they signalled that apartheid had become internationally untenable and helped shift the calculus of the National Party government toward the negotiations that would free Mandela in 1990 and dismantle the system. The override remains a landmark of American legislative assertiveness on human rights.

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