By the mid-1960s, the country had fallen into proxy warfare between pro-US and pro-North Vietnamese irregular military groups. The PAVN/Pathet Lao battled the RLA, US irregular forces (including Air America and other contract employees and Hmong commandos) and Thai volunteer forces in Laos winning effective control in the north and east. The government itself was effectively powerless. Until 1968 military operations were conducted by small units, usually of company or at most Battalion size. Typically the RLA would be dominant in the wet season from May through October when the PAVN/Pathet Lao were immobilized by the rains and the PAVN/Pathet Lao would dominate during the dry season from November through April. PAVN forces in Laos were primarily focused on supporting and defending the Ho Chi Minh Trail, with support for the Pathet Lao revolution as a secondary role. In 1968 of the estimated 40,000 PAVN troops in Laos, 25,000 were engaged in supporting the Trail, 700 as advisers to the Pathet Lao and the remainder in mobile units supporting Pathet Lao operations. Publicly the North Vietnamese maintained that they did not have any troops in Laos and were respecting the Geneva Agreement, while the United States and its allies were violating it; the United States asserted the exact opposite.