Interesting fact about British colonial rule in Singapore: for many years, Singapore was the naval base in that region. The colonial masters thought it well fortified, well defended; those scrawny ‘Orientals’ (the Japanese) could never possibly take it, not with the big guns pointed at sea
Anyway, the Japanese came rolling over on bicycles
The resulting years of Japanese occupation were also brutal.
https://thehistorianshut.com/2016/11/17/strange-but-successful-war-strategies-japans-wwii-bicycle-infantry/