On January 30, 1968, the Vietnamese Ranger battalion was alerted when a nearby provincial capital came under attack. Half the men were sent there right away and the other half prepared to follow. Then, another message came in. Stop, don't leave the camp. The VC are coming. It was the beginning of the Tet Offensive and American advisor Keith Nightingale dug in with the Rangers as the enemy nearly overwhelmed them. Part 1 of 3. (8:04)