More controversially, he established close, friendly ties with the Burmese dictatorship. Thailand joined the US-led invasion of Iraq, sending a humanitarian contingent until September 2004. Thailand also had contributed troops to reconstruction efforts in Afghanistan. In April 2009, the Cambodian–Thai border dispute brought troops on territory immediately adjacent to the 900-year-old ruins of Cambodia's Preah Vihear Hindu temple near the border. After the 2014 coup, Thailand leaned more towards China. Growing Chinese influence and capital inflow caused some members of parliament to raise the concern about "economic colony" under China after many concessions. Armed forces The Royal Thai Armed Forces (กองทัพไทย; ) constitute the military of the Kingdom of Thailand. It consists of the Royal Thai Army (กองทัพบกไทย), the Royal Thai Navy (กองทัพเรือไทย), and the Royal Thai Air Force (กองทัพอากาศไทย). It also incorporates various paramilitary forces. The Thai Armed Forces have a combined manpower of 306,000 active duty personnel and another 245,000 active reserve personnel. The head of the Thai Armed Forces (จอมทัพไทย, Chom Thap Thai) is the king, although this position is only nominal. The armed forces are managed by the Ministry of Defence of Thailand, which is headed by the Minister of Defence (a member of the cabinet of Thailand) and commanded by the Royal Thai Armed Forces Headquarters, which in turn is headed by the Chief of Defence Forces of Thailand. Thai annual defense budget almost tripled from 78 billion baht in 2005 to 207 billion baht in 2016, accounting for approximately 1.5% of 2019 Thai GDP. Thailand ranked 16th worldwide in the Military Strength Index based on the Credit Suisse report in September 2015. The military is also tasked with humanitarian missions, such as escorting Rohingya to Malaysia or Indonesia, ensuring security and welfare for refugees during Indochina refugee crisis. According to the constitution, serving in the armed forces is a duty of all Thai citizens. Thailand still use active draft system for males over the age of 21. They are subjected to varying lengths of active service depending on the duration of reserve training as Territorial Defence Student and their level of education. Those who have completed three years or more of reserve training will be exempted entirely. The practice has long been criticized, as some media question its efficacy and value. It is alleged that conscripts end up as servants to senior officers or clerks in military cooperative shops. In a report issued in