This book was obtained from the estate of a helo pilot that flew armed helicopters with this unit. These types of books are very rare and becomeing very hard to obtain. They are also full of great information and names. I will be listing a few other helo items that was obtained with this book at the estate. The item "145th combat aviation battalion year book helicopter pilot flight helmet history" is in sale since Saturday, January 30, 2021.This item is in the category "Collectibles\Militaria\Vietnam (1961-75)\Original Period Items\Uniforms". The seller is "b7family" and is located in Uniontown, Ohio. This item can be shipped worldwide.