CHOEUNG EK, Cambodia (AP) 鈥 About 2,000 people attended Cambodia's annual Day of Remembrance Tuesday to mark half a century since Cambodia鈥檚 communist Khmer Rouge launched a four-year reign of terror that caused the deaths of about 1.7 million people.

Some three dozen student actors from a Phnom Penh art school re-enacted brutalities under the Khmer Rouge, which held power from 1975-1979, when an estimated one-quarter of Cambodia's population was wiped out due to tortures, executions, starvation and misrule.

The official ceremony honoring the victims of what a judged to be was held at Choeung Ek, site of a Khmer Rouge 鈥淜illing Field鈥 about 15 kilometers (10 miles) south of the capital Phnom Penh. Several dozen Buddhist monks were among those attending.

Garbed in black, the Khmer Rouge鈥檚 standard attire, the performers acted as executioners, swinging bamboo sticks at the heads of victims whose arms were bound behind their backs. The re-enactment was held near a memorial displaying victims鈥 skulls and mass graves where thousands of others were buried.

鈥淲hen I come here, it reminded me, and I will never forget, this Khmer Rouge regime because it was extremely cruel and barbaric,鈥 said 71-year-old Nhem Sovann, a Phnom Penh resident who said she lost six family members 鈥 her parents-in-law and two brothers and two sisters. She was put to work faming a rice field in the western province of Pursat.

"I saw with my own eyes that even children were taken and had their heads smashed against the trunk of a coconut tree,鈥 she said, sobbing.

For a younger generation, the 鈥淒ay of Remembrance鈥 is a learning experience.

Pen Kunthea, a 23-year-old art student who portrayed a government soldier who rescued fellow Cambodians from the Khmer Rouge as they were being chased from power in early 1979, said the more she performs, the more she learns.

She said she first learned about the Khmer Rouge regime from her parents and from her studies, and that one of her uncles died from illness during the Khmer Rouge鈥檚 time in power.

鈥淚 feel scared, and I think the Khmer Rouge made our people afraid and I don鈥檛 want that regime to happen again,鈥 Pen Kunthea said.

鈥淲hen I perform, it makes me feel like I was in the middle of the story,鈥 she said, adding that she was excited to be able to portray the history of the regime.

The Khmer Rouge captured Phnom Penh on April 17, 1975 and immediately herded almost all the city鈥檚 residents into the countryside, where they were forced to toll in harsh conditions until in 1979, when the regime was driven from power by an invasion from neighboring Vietnam.

In 1984, a new Cambodian government installed by the Vietnamese declared May 20, the day the genocide was said to begin, to be a for people to vent their anger against the Khmer Rouge and its backers.

At the time the Khmer Rouge were still trying to regain power by fighting a from the countryside, only to be finally subdued in 1997.

In 2018, the day was officially redesignated the 好色tv Day of Remembrance, with an emphasis on honoring the victims.

In a statement issued Tuesday, Prime Minister Hun Manet urged all Cambodians join in preserving and protecting peace.

鈥淓ven though these tragic events have passed, and the Cambodian people have been living in peace, political stability, and full of development in all fields, we must not let go or forget this bitter past," he said.

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