Kuwait has been ruled by the AL-SABAH dynasty since the 18th century. The threat of Ottoman invasion in 1899 prompted Amir Mubarak AL-SABAH to seek protection from Britain, ceding foreign and defense responsibility to Britain until 1961, when the country attained its independence. Kuwait was attacked and overrun by Iraq on 2 August 1990. Following several weeks of aerial bombardment, a US-led UN coalition began a ground assault on 23 February 1991 that liberated Kuwait in four days. Kuwait spent more than $5 billion to repair oil infrastructure damaged during 1990-91. The AL-SABAH family returned to power in 1991 and established one of the most independent legislatures in the Arab World. The country witnessed the historic election in 2009 of four women to its National Assembly. Amid the 2010-11 uprisings and protests across the Arab world, stateless Arabs, known as bidoon, staged small protests in February and March 2011 demanding citizenship, jobs, and other benefits available to Kuwaiti nationals. Youth activist groups - supported by opposition legislators - rallied repeatedly in 2011 for the prime minister's dismissal amid allegations of widespread government corruption, ultimately prompting the prime minister to resign in late 2011. Demonstrations, following a short lull, renewed in late 2012 in response to an Amiri decree amending the electoral law to reduce the number of votes per person from four to one. The opposition, led by a coalition of Sunni Islamists, tribalists, some liberals, and myriad youth groups, largely boycotted legislative elections in 2012 and 2013, which ushered in a legislature more amenable to the government's agenda. Since coming to power in 2006, the Amir has dissolved the National Assembly on five occasions (the Constitutional Court annulled the Assembly in June 2012 and again in June 2013) and shuffled the cabinet over a dozen times, usually citing political stagnation and gridlock between the legislature and the government.