His Excellency Samdech Hun Sen, Distinguished Companion of Commercial Diplomacy, was born on August 5, 1952 in Peam Koh Sna Commune, Stoeung Trang District of Kampong Cham Province. Upon completion of his local primary schooling in 1965, Hun Sen came to Phnom Penh to continue his secondary education in the Lycée Indra Devi.

In 1970, Cambodia was plunged into war. Responding to the appeal of Prince Sihanouk to Cambodians to join the war against the imperialists, at the age of 18, Hun Sen joined the struggle movement, which liberated the country on April 17, 1975.

One day before the victory, on April 16, 1975, Hun Sen was wounded in the left eye. Recovering after months of treatment, he married Bun Rany (Hun Sen and Bun Rany have three sons and three daughters one of whom is adopted Hun Manet, Hun Mana, Hun Manit, Hun Mani, Hun Mali, and Hun Malis.)

For his great efforts and contributions to national reconciliation, peace, and the socio-economic development of Cambodia, Hun Sen is awarded the title of "Samdech" by His Majesty the King Samdech Preah Norodom Sihanouk.

Witnessing the Pol Pot regime's policy of genocide, in 1977 he left his beloved family again to lead a movement aimed at liberating Cambodia and its people from the genocidal regime. In 1978, Hun Sen became a founding member of the United Front for the National Salvation of Kampuchea (UFNSK). In collaboration with other patriotic movements and with the support of Vietnamese volunteer forces, on January 7, 1979, the UFNSK rescued Cambodia and its people from the genocidal regime of Democratic Kampuchea.