The event was intended to honor the Battle of Dak To, a Vietnam engagement composed of elements from the 4th Infantry Division.
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....Reminds me of the time we had a REGT run around Ft Campbell. Route went thru the area were the CS Chamber was operated and in operation on the same day as our run. Nothing like getting a good chest full of CS blowing around while at a double time. FYI: We didn't die.