After his time as governor general, Soustelle returned to France to organize support for de Gaulle's return to power, while retaining close ties to the army and the pieds-noirs. By early 1958, he had organized a coup d'état, bringing together dissident army officers and pieds-noirs with sympathetic Gaullists. An army junta under General Massu seized power in Algiers on the night of May 13, thereafter known as the May 1958 crisis.
At Australia's request, the United Kingdom transferred sovereignty to Australia, with a $20 million payment from the Australian government to Singapore as compensation for the loss of earnings from the phosphate revenue. The United Kingdom's Christmas Island Act was given royal assent on 14 May 1958, enabling Britain to transfer authority over Christmas Island from Singapore to Australia by an order-in-council.
During the Tatmadaw's (Myanmar Armed Forces') heavy militarisation of the state in the late 1940s and early 1950s, locals accused them of mistreating, torturing, robbing, raping, unlawfully arresting and massacring villagers. As a result, on 21 May 1958, an armed resistance movement, led by Sao Noi and Saw Yanna, was started in Shan State.