As the Tet Offensive broke out, ad hoc arrangements were made to ferry troops to the worst hit areas. In one case trucks dropped their cargo loads on the side of the highway to pick up a company on the road.
When calmer heads prevailed, a Quartermaster Sergeant Major insisted the these crates, carrying 100 cases of LAWS be secured for immediate use in the defence of Saigon. Two Squads of infantry with their M113s head down to the fork in the highway to collect.
A cadre of Viet Cong which were heading to the junction to ambush passing American units discovered the crates and once they could hear the heavy tracks down the road, decided to hold out as long as they could and try to set the crates on fire or destroy them somehow
Full report at
http://donoghmccarthy.blogspot.com/2012/01/scorched-earth.html