Although the United States had indirectly supported the Khmer Rouge by backing the CGDK government-in-exile in the 1980s,(56) the U.
Inside Cambodia, Hun Sen's political calculation at the end of 1998 favored prosecution by a national tribunal with international assistance, and King Sihanouk also seemed to be in favor of this means of clarifying his role in the CGDK.
In fact, however, as the citizens of the PRK realized, K5 referred specifically only to the second of these: the plan to seal off the border with Thailand in order to prevent further infiltration by CGDK
While all ASEAN members agreed on supporting the CGDK diplomatically, differences over the provision of military assistance led ASEAN states to act separately.
The latter two countries insisted that Vietnam should meet directly with the CGDK.
The split in Cambodia's state sovereignty was representative of the war between the CGDK
and the Phnom Penh government, and therefore was matched by the enormous security problems Cambodians endured from 1979 to the 1991 Paris Peace Agreements and the subsequent United Nations intervention.