Letter from Brigadier General Robert R. Williams to the U.S. Army Primary Helicopter School congratulating them on their 10th anniversary. He also briefly touches on the war in Vietnam. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from Lieutenant General T. W. Dunn to Colonel E. P. Fleming congratulating the U. S. Army Primary Helicopter School on their 10th anniversary. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from Walter Cronkite, from CBS News, to the men of the U.S. Army Primary Helicopter School commending them for their work. He briefly touches on the war in Vietnam. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from Colonel J. R. Duffy to the U.S. Army Primary Helicopter School congratulating them on their 10th anniversary. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from actor John Wayne to the U.S. Army Primary Helicopter Center, commending them on their work. He also briefly mentions the war in Vietnam. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from Colonel Arnold A. Berglund to the U.S. Army Primary Helicopter School congratulating them on their 10th anniversary. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from retired General Hamilton H. Howze to Captain William F. Gabella congratulating the U.S. Army Primary Helicopter School on their 10th anniversary. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from Eric Sevareid to Captain William F. Gabella, congratulating the U.S. Army Primary Helicopter School on their 10th anniversary. He also briefly mentions the Vietnam War. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Photograph of retired US Army General Mark. W. Clark. The general is sitting at a desk in uniform. On the desk are two upright-standing pens, a small knick-knack shaped like a man, and a desk sign with General Clark's name and rank. Behind him, two standing flags are visible. On the back of the photograph are a stamp giving the Boyce-Ditto Public Library's address and handwritten notes, including one that reads, "1966."

Letter from General Omar N. Bradley to Captain William F. Gabella commenting on the 10th anniversary of the U.S. Army Primary Helicopter Center. He apologizes for not replying to the Center's request for comments, citing being out of the city for a month as his reason. He also briefly mentions Vietnam. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from Texas Senator Tom Creighton to Colonel E. P. Fleming, Jr. congratulating the U.S. Army Primary Helicopter Center on their 10th anniversary. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.

Letter from retired General Mark W. Clark to the U.S. Army Primary Helicopter School on their 10th anniversary. He also briefly mentions the wars in Vietnam and Korean. On the back of the letter is a stamp giving the Boyce-Ditto Public Library's address.