Following the 2013–14 Thai political crisis, Prayuth staged a coup against the caretaker government of Yingluck Shinawatra on 22 May 2014. Yingluck herself was earlier removed by the Constitutional Court and Niwatthamrong Boonsongpaisan acted in her place. After the coup, Prayuth repealed the 2007 constitution and established the NCPO to govern the nation, with himself as its leader.[24] Prayuth launched rampant crackdowns on dissent. He took control of the media, imposed internet censorship, declared curfew nationwide, banned gatherings of five persons or more, and arrested politicians and anti-coup activists. Some of the arrestees were charged with sedition and tried in military courts.[14][25][26] He also required all students in Thai schools to pass tests of twelve 'values' determined by him.[15][16]