<P> The Union of South Africa ( Dutch : Unie van Zuid - Afrika , Afrikaans : Unie van Suid - Afrika ) is the historic predecessor to the present - day republic of South Africa . It came into being on 31 May 1910 with the unification of four previously separate British colonies : the Cape , Natal , Transvaal and Orange River colonies . It included the territories formerly part of the Boer republics annexed in 1902 , the South African Republic and the Orange Free State . </P>
<P> The Union of South Africa ( Dutch : Unie van Zuid - Afrika , Afrikaans : Unie van Suid - Afrika ) is the historic predecessor to the present - day republic of South Africa . It came into being on 31 May 1910 with the unification of four previously separate British colonies : the Cape , Natal , Transvaal and Orange River colonies . It included the territories formerly part of the Boer republics annexed in 1902 , the South African Republic and the Orange Free State . </P>
when was the union of south africa formed
when was the union of south africa formed
31 May 1910
31 May 1910