Britain took control of Singapore.
Britain lose Singapore to Japanese a long time ago
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Its "British empire" you silly slag! And to answer your question, because the japs were holding on to it and we were kinda at war with tham. :-) Singapore was attacked by the Japanese and Singapore was the major British military base in South East Asia, so Singapore belonged to Britain at that time, before they surrender Singapore to Japan and hence, Singapore was not attacked by the Britain Empire.
Singapore was colonised by the British in 1819.
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Singapore was a British colony at the time and Britain's key base in the Far East. It fell to the Japanese in January 1942, whereupon the Japanese committed a whole series of appalling atrocities against the inhabitants.
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A parliamentary republic. But Singapore's government started when it was ruled by Britain so the government was chosen by Britain