 Complete the following phrase:  Puller was father-in-law to Colonel William H. Dabney, USMC retired, a Virginia Military Institute VMI graduate, who was the commanding officer then Captain of two heavily reinforced rifle companies of the 3rd Battalion, 26th Marines 326 from January 21 to April 14, 1968, in Vietnam. During the entire period, Colonel Dabneys force stubbornly defended Hill 881 South, a regional outpost vital to the defense of the Khe Sanh Combat Base during the 77-day siege at the 