PFH1173824: Vietnam: Refugees from the Second Indochina War take a ride on a USAF helicopter to a 'safe area' near Saigon, 1966 / Bridgeman Images

PFH1173826: Vietnam: Armed Forces of the Republic of Vietnam (ARVN) General Pham Van Dong, Military Governor of Saigon, 1965 / Bridgeman Images

PFH1173835: Vietnam: A jar with lotus and chrysanthemum motifs, patterned brown glaze ceramic, Trần dynasty, 13th-14th century / Bridgeman Images

PFH1173842: Vietnam: Trung Sisters temple, Me Linh (birthplace of the sisters), northwest of Hanoi / Bridgeman Images

PFH1173844: Cambodia: Neak Pean during the dry season, the central island faced by a statue of Balaha (Bodhisattva Guanyin transformed into a horse), Angkor / Bridgeman Images

PFH1173846: Cambodia: Neak Pean during the dry season, the central island faced by a statue of Balaha (Bodhisattva Guanyin transformed into a horse), Angkor / Bridgeman Images

PFH1173853: China: Buddhist monks visiting the Forbidden City (Zijin Cheng), Beijing / Bridgeman Images

PFH1173867: Vietnam: Led by an RB-66 Destroyer, pilots flying Air Force F-4C Phantoms drop bombs on a Communist military target in North Vietnam., August 1966 / Bridgeman Images

PFH1173873: Vietnam: A Vietnamese Army honour guard, Hanoi, 2010 / Bridgeman Images

PFH1173877: Vietnam: Communist propaganda poster: 'The Army and People are of One Mind'! 2010 / Bridgeman Images

PFH1173887: Vietnam: AH-1G Cobra helicopters over southern Vietnam, 1968 / Bridgeman Images

PFH1173901: China: Incense burner, The Forbidden City (Zijin Cheng), Beijing / Bridgeman Images

PFH1173912: Vietnam: Captain Michael Harvey, US Army MP, inspects a captured National Liberation Front (Viet Cong) AK-47, 1968 / Bridgeman Images

PFH1173914: Vietnam: Troops from the US 7th Cavalry Division firing a quad 50 machine gun during a 'Search and Destroy' operation in Binh Dinh Province, 1967 / Bridgeman Images

PFH1173916: Vietnam: Two South Vietnamese Air Force North American T-28C Trojan aircraft flying over the Vietnamese coastline during a counterinsurgency training mission in 1962. / Bridgeman Images

PFH1173922: Vietnam: US troops 'torch' a village near My Tho in the Mekong Delta in a bid to deny local support to National Liberation Front (Viet Cong) guerrillas, c.1967 / Bridgeman Images

PFH1173929: Cambodia: The main tower in the central sanctuary, Bakong temple, Roluos Complex, Angkor / Bridgeman Images

PFH1173930: Cambodia: Bas-relief in the central sanctuary, Bakong temple, Roluos Complex, Angkor / Bridgeman Images

PFH1173932: Cambodia: The main tower in the central sanctuary, Bakong temple, Roluos Complex, Angkor / Bridgeman Images

PFH1173940: China: Pavilion overlooking the rock garden in the Imperial Flower Garden, The Forbidden City (Zijin Cheng), Beijing / Bridgeman Images

PFH1168344: Thailand: Royal barges pass the temple of Wat Chetuphon in Bangkok during the annual Kathin ceremony, late-19th century. / Bridgeman Images

PFH1168346: Thailand: Four convicted criminals in chains, Siam, c. 1900 / Bridgeman Images

PFH1168348: Thailand: A festive parade in Phetchaburi, Thailand, late-19th century. / Bridgeman Images

PFH1168351: Thailand: A rice barge sails past a village on the Rangsit Canal, c. 1900. / Bridgeman Images

PFH1168352: Thailand: The view looking upriver to the Grand Palace and Wat Phra Kaew from Wat Arun, Bangkok, c. 1900. / Bridgeman Images

PFH1168358: Thailand: An honorary arch in Bangkok erected to welcome King Chulalongkorn on his return from Europe in 1907. / Bridgeman Images

PFH1168364: Thailand: A provisional palace in Bangkok, built to celebrate the 40th anniversary of King Chulalongkorn in 1908. / Bridgeman Images

PFH1168367: Thailand: Young northern Thai women pose for a photograph on a wooden stairway, c. 1900. / Bridgeman Images

PFH1168376: Thailand: A funeral possession accompanies the carriage carrying the remains of King Chulalongkorn, 1911. / Bridgeman Images

PFH1168377: Thailand: A gilded carriage carries the urn containing the ashes of Prince Uruphong who died in 1909. / Bridgeman Images

PFH1168382: Thailand: A houseboat sails on a canal in the plain of the Chao Phraya River, c. 1900. / Bridgeman Images

PFH1168384: Thailand: Women stop for a rest on a riverbank near Uttaradit, northern Thailand, c. 1900. / Bridgeman Images

PFH1168404: Mongolia: Biligtu Khan, born Ayushiridara, Khan of the Northern Yuan Dynasty (r.1370-1378). / Bridgeman Images

PFH1168406: Engke Khan, ruler of the Northern Yuan Dynasty (r.1389-1392). / Bridgeman Images

PFH1168411: Mongolia: Delbeg Khan, Mongol Khagan of the Northern Yuan Dynasty (r.1411-1415). / Bridgeman Images

PFH1168415: Mongolia: Esen Taishi, Khagan of the Northern Yuan Dynasty (1452-1455). / Bridgeman Images