Cambodia's retired king Norodom Sihanouk returned to his homeland for a two-month visit Thursday after spending almost a year in Beijing receiving treatment for cancer, according to dpa. The 86-year-old king-father and Queen-Mother Monique landed at Siem Reap International Airport about 3 pm and immediately traveled to a royal residence in the northern town. Sihanouk last month announced he would return to Cambodia for two months after being successfully treated in Beijing for B-cell lymphoma, which attacks blood cells crucial to the body's immune system. It was his third bout of cancer since 1993. But Sihanouk said at the time he would have to return to Beijing after two months to continue his medical treatment. Sihanouk abdicated and was replaced by his son Norodom Sihamoni in 2004, but he remains an influential figure in Cambodian politics. He was appointed king by Cambodia's French rulers in 1941, but in 1955 Sihanouk abandoned the throne to become prime minister. After being overthrown in a military coup in 1970, Sihanouk sided with the Maoist Khmer Rouge, who came to power in 1975 and oversaw the deaths of up to 2 million people until Vietnam invaded in 1979. He was forced out of office again and remained virtually imprisoned in the Royal Palace in Phnom Penh during most of the Khmer Rouge's rule. Sihanouk returned to the throne in 1993, but frequently traveled to Beijing for treatment for a range of illnesses.