thirds of the country's foreign debt. Tonga retains cordial relations with the United States. Although it remains on good terms with the United Kingdom, the two countries do not maintain particularly close relations, and the United Kingdom closed its High Commission in Tonga in 2006, although the UK High Commission was re-established in January 2020 after a 14-year absence. Tonga's relations with Oceania's regional powers, Australia and New Zealand, are good. Tonga maintains strong regional ties in the Pacific. It is a full member of the Pacific Islands Forum, the South Pacific Applied Geoscience Commission, the South Pacific Tourism Organisation, the Pacific Regional Environment Programme, and the Secretariat of the Pacific Community. Military The Tongan government supported the American "coalition of the willing" action in Iraq and deployed more than 40 soldiers (as part of an American force) in late 2004. The contingent returned home on 17 December 2004. In 2007 a second contingent went to Iraq, and two more were sent during 2008 as part of continued support for the coalition. Tongan involvement concluded at the end of 2008 with no reported loss of life. In 2010, Brigadier General Tauʻaika ʻUtaʻatu, commander of the Tonga Defence Services, signed an agreement in London committing a minimum of 200 troops to co-operate with Britain's International Security Assistance Force in Afghanistan. The task was completed in April 2014 and the UK presented Operational Service Medals to each of the soldiers involved during a parade held in Tonga. Tonga has contributed troops and police to the Bougainville conflict in Papua-New Guinea and to the Australian-led RAMSI force in the Solomon Islands. Administrative divisions Tonga is subdivided into five administrative divisions: ʻEua, Haʻapai, Niuas, Tongatapu, and Vavaʻu. Geography Located in Oceania, Tonga is an archipelago in the South Pacific Ocean, directly south of Samoa and about two-thirds of the way from Hawai'i to New Zealand. Its 171 islands, 45 of them inhabited, are divided into three main groups – Vava'u, Ha'apai, and Tongatapu – and cover an -long north–south line. The largest island, Tongatapu, on which the capital city of Nukuʻalofa is located, covers . Geologically the Tongan islands are of two types: most have a limestone base formed from uplifted coral formations; others consist of limestone overlaying a volcanic base. Climate Tonga has a tropical rainforest climate (Af) with a distinct warm period (December–April), during which the temperatures rise above , and a