 North Vietnam sent 10,000 troops to attack the south in 1964, and this figure increased to 100,000 in 1965.By early 1965, 7,559 South Vietnamese hamlets had been destroyed by the Viet Cong.The CIA organized Hmong tribes to fight against the Pathet Lao, and used Air America to "drop 46 million pounds of foodstuffs...transport tens of thousands of troops, conduct a highly successful photoreconnaissance program, and engage in numerous clandestine missions using night-vision glasses and state-of-the-art electronic equipment."