US infantry & artillery units which took part in battles in the Loc Ninh area in early Nov. '67.
The Battle of Loc Ninh is a misnomer. There were actually several major battles and numerous firefights fought in and near the town, which was a district capital. Every American unit in the area fought at least one major engagement. Starting with unsuccessful attacks on the US Special Forces and District HQ compounds with overwhelming force, they included the Battle of Loc Ninh Airstrip, Battle of Srok Silalite III, Battle of Bhu No Rung and the Battle of Srok Rung, as well as others that didn't get named. In addition to the Special Forces team garrisoned at Loc Ninh, units engaged included 1/28th Infantry, 2/28th Infantry, 1/18th Infantry, 1/26th Infantry, all from the 1st Infantry Division; and 2/12th Infantry, which belonged to the 25th Infantry Division. Also joining in was 1/4th Cav (Quarterhorse) as the fighting spread. For what it's worth, it was estimated that a total of almost 1,000 VC and NVA soldiers were killed in the vicinity of Loc Ninh in early November.
Artillery units on this map included A & B Batteries of 2/33rd Artillery and A Battery 6/15th Artillery. They were all Big Red One units.
In retrospect, it was found that the attacks at Loc Ninh were part of the "Border Battles", which were planned to pull US units away from the defense of the larger cities in preparation for the Tet Offensive at the end of January. The plan worked temporarily, at the cost of horrendous VC casualties, but was undone by re-deployment of the American units in January.
The November 10, 1967 Time Magazine article about the battles around Loc Ninh can be found here: http://www.time.com/time/magazine/article/0,9171,837516,00.html