Martial law can be used by governments to enforce their rule over the public, as seen in multiple countries listed below. Such incidents may occur after a coup d'état (Thailand in 2006 and 2014, and Egypt in 2013); when threatened by popular protest (China, Tiananmen Square protests of 1989); to suppress political opposition (martial law in Poland in 1981); or to stabilize insurrections or perceived insurrections (Canada, the October Crisis of 1970). Martial law may be declared in cases of major natural disasters; however, most countries use a different legal construct, such as a state of emergency.