The defining battle of the Vietnam war is now the subject of the film Danger Close. Harry Smith recalls the afternoon that changed his life

If he dwells on it, Lt Col Harry Smith can still see, vividly, the blood on the trees on the enemy’s escape path. There was so much blood. In the days after the three savage hours that was the battle of Long Tan, his soldiers were finding body parts, carnage and corpses spread across the battlefield. But it was that blood, “the blood of all the others that were dragged away, wounded, suffering”, that affects him the most. “That worries me more than a dead body.” In the eerie silence, in the pervasive gloom, among the smell of the dead in the Long Tan rubber plantation, latex ran down trees punctured by bullets and mingled with the blood.

Long Tan had been a battle fought against almost impossible odds. A ferocious battle, a defining action of the Vietnam war. On the afternoon of 18 August 1966, a single infantry company of 108 mostly inexperienced Australian and New Zealand soldiers engaged with a regiment of 2,500 battle-hardened Viet Cong and North Vietnam army troops. Almost surrounded, outnumbered 10 to one, they withstood Viet Cong attacks in cyclonic rain.