Passage: In the later part of 1966, the 1st Squadron, 10th Cavalry , went to the Republic of South Vietnam during the Vietnam War  operating in the II Corps Area as part of the 4th Infantry Division. It received its first Valorous Unit Award in May 1969 for actions at LZ Oasis against a battalion sized enemy force. The 1st Squadron of the 10th, with the 4th Infantry Division, earned 12 campaign streamers and other awards in Vietnam. In April 1972, Troop H/10th Air Cavalry was formed  and placed under the 17th Aviation Group at Pleiku. The troop was located at Lane Army Airfield near An Son .  H Troop aircrews conducted aerial reconnaissance, hunter/killer, and search & destroy missions using OH-6 Cayuse , AH-1 Cobra , and UH-1 Iroquois  helicopters and ground troops from the Republic of Korea's 2nd Infantry Division and the various South Vietnamese Army units.  The unit disbanded shortly after the Paris Peace Accords were signed in 1973. Specialist 4 Robert Frakes, the last American combat casualty of the Vietnam War, perished in a post-crash fire after his OH-6 helicopter was lost to enemy fire on January 26 - the last day of US combat operations.
How many years after the 1st Squadron, 10th Cavalry went to the Republic of South did it received its first Valorous Unit Award? What unit disbanded shortly after the Paris Peace Accords were signed in 1973? What was Robert Frakes flying in when it crashed, killing him in the fire? Which happened first, the Paris Peace Accords or the 1st Squadron, 10th Cavalry receiving its first Valorous Unit Award?