2000 Cambodian coup d'état attempt
On 24 November 2000, the Cambodian Freedom Fighters unsuccessfully attempted to overthrow the government of Cambodia in a failed coup d'état. In what the group termed the "Operation Volcano" plot, dozens of rebels attacked government buildings in Phnom Penh in an attempt to depose Hun Sen's government.
Source: Wikipedia — 2000 Cambodian coup d'état attempt (CC BY-SA 4.0)