From Singapore's independence in 1965 to 1981, the People's Action Party won every single seat in every election held, forming a parliament with no elected opposition MP for almost two decades. In Singapore, opposition politicians and trade unionists were detained in prison without trial before in the 1960s and early 1970s. Many such as Lim Chin Siong, Said Zahari and Lim Hock Siew were accused by the government of being involved in subversive communist struggles. Among them, Chia Thye Poh was detained the longest; he was detained for 23 years without any trial.