now, in 1970, a general -- cambodian general overthrows cianouk and starts fighting the communists. his new government -- his new government demanded that the communists leave in three days. they didn't. and here you have the intervention of the communists -- really a significant intervention of the north vietnamese communists in cambodia. you provoke a civil war in cambodia that becomes pretty messy and lays the foundation for some disasters afterward. now, the nixon administration at this point decides also to take the war to cambodia and hit the vc base areas here, which is very effective. and messes up a lot of the north vietnamese plans and delays some of their operations for a year. but for the north, the real war for north vietnam is still in south vietnam. and the communists during this period in the early '70s will intensify their guerrilla activity, particularly in rural areas, the southern part of the country that's heavily populated. and again, they're still looking to build their forces, to destroy south vietnam. and so, again, build forces. defeat their pacification ef