 Complete the following phrase:  Amid decolonisation and the Wind of Change, the Federation failed to become a Commonwealth realm and collapsed in 1963. Two years later, following prolonged dispute with Britain over the terms for full sovereignty, the mostly white government in Southern Rhodesia or Rhodesia, following Northern Rhodesias independence as Zambia issued a Unilateral Declaration of Independence UDI. The Rhodesian government, which had in it World War II veterans including the Prime Minister Ian Smith, attempted to emphasise Rhodesians prior war record on Britains behalf by declaring independence on Armistice Day, 11 November, at 11:00 local time. As part of its subsequent isolation of Rhodesia, the UK government banned the post-UDI authorities from taking part in the annual Armistice Day service at the Cenotaph in London. Smiths government organised its own Rhodesian wreath-laying ceremony there. Veterans of World War II and Malaya held many key positions in the Rhodesian Security Forces during the 