Singapore is a small country among much bigger neighbours. What if Singapore is attacked?

This is one of the most common misconceptions about Singapore, although at first sight it may seem a reasonable concern.
 
Singapore has been very careful to neither ally nor distance itself with any major power as they try to avoid policies that could cause conflict down the line. In line with this policy, Singapore has managed to build a number of mutual defence treaties with surrounding countries designed to reinforce stability in the region.

Surprisingly, Singapore also carries an enormous stick relative to its small size. Regionally, this city nation is a military heavyweight, given the two year compulsory military service for Singaporeans that allow the armed forces, police and the civil defence force to deploy over 1.4 million personnel with a large portion deployable at short notice given the yearly week-long readiness drills. The defence budget is around 12.1 Billion SGD (almost 10 billion USD) making Singapore a medium sized spender internationally and the country with the highest military expenditure in the entire ASEAN region; larger than Indonesia or Thailand.

Singapore even has a defence industry which locally manufactures and exports the SAR 21 rifles and various artillery pieces which are used by other militaries and Special Forces. Singapore also has both training and military bases in Taiwan, Thailand, Australia, India and the US (Idaho). In other words, Singapore is very well defended regionally.

In comparison, the nearest neighbour Malaysia has a professional army consisting of approximately 400,000 troops including the active reserve personnel. As for China, Singapore is the largest foreign investor in China and is seen as one of their most important regional partners. In 2015, Singapore was chosen to host the first historical meeting between highest representatives from China and Taiwan. In simple terms, China would have a lot to lose and almost nothing to gain from attacking Singapore.