Pre-Crisis Phase (May 31, 1910-June 13, 1913): South Africa formally achieved its independence from Britain on May 31, 1910. General Louis Botha formed a government as prime minister on May 31, 1910.
How did South Africa become independent?
1934 – The Union of South Africa parliament enacts the Status of the Union Act, which declares the country to be “a sovereign independent state”. The move followed on from Britain’s passing of the Statute of Westminster in 1931, which removed the last vestiges of British legal authority over South Africa.