Key moments in Thailand's political crisis

Thailand's military seized power in a coup and suspended the constitution Thursday after six months of protests and a political deadlock. Some key dates in the long-running conflict since the last coup nearly eight years ago:

• Sept. 19, 2006: The army topples Prime Minister Thaksin Shinawatra in a bloodless coup following months of protests alleging corruption, abuse of power and disrespect for the monarchy.

• December 2007: A pro-Thaksin political party easily wins elections and later names Samak Sundaravej as prime minister.

• August 2008: Thaksin opponents, known as the Yellow Shirts, take over the prime minister's office compound and stay for three months. They later take over Bangkok's two airports for a week, halting air travel.

• September: Samak is removed from office after a court rules payment for an appearance on a TV cooking show constituted conflict of interest. Parliament selects Somchai Wongsawat - Thaksin's brother-in-law - as his successor.

• October: The Supreme Court sentences the self-exiled Thaksin to two years in prison for corruption.

• December: Protests end after a court finds Somchai's party guilty of electoral fraud and dissolves it. With the backing of the military, opposition Democrat Party leader Abhisit Vejjajiva is chosen prime minister.

• March 2010: Pro-Thaksin Red Shirts aiming to drive out Abhisit start street protests that clog central Bangkok. The military storms their camp two months later; more than 90 people, mostly protesters, are killed and 1,800 wounded in the crackdown and earlier clashes.

• July 3, 2011: The Thaksin-backed Pheu Thai party wins election by a landslide, and his sister, Yingluck Shinawatra, later becomes prime minister.

• Nov. 1: The lower house of Parliament passes an amnesty bill that could allow Thaksin to return from exile. Public anger builds, though the bill dies.

• Nov. 26: Protest leader Suthep Thaugsuban demands that the government be dissolved and an unelected "people's council" be established to make reforms to eliminate all vestiges of Thaksin's political power.

• Dec. 9: Yingluck announces she will dissolve the lower house of Parliament, calling early elections in an attempt to calm the crisis.

• Feb. 2, 2014: National elections are disrupted by protesters and are later ruled invalid under the constitution.

• May 7: The Constitutional Court ousts Yingluck for nepotism and removes nine Cabinet members for complicity.

• May 20: Military declares martial law, saying it needed to restore order.

• May 21: Military summons political rivals to meet face-to-face, though the talks appear to produce no results.

• May 22: Military seizes power in a coup, suspends the constitution and announces a curfew.