This collection relates to Carl Lyren who served in the United States Marine Corps in 2nd Marine Division the Pacific Theater. The materials of this collection are made up of maps, unclassified documents from both Japanese and U.S. forces, books, letters, interviews with veterans, photographs, newspaper clippings, and personal notes made by Carl Lyren in his research in writing on the battle of Peleliu, also in this collection is the original manuscript of the publication Dogged Courage: The Struggle for Peleliu, 1944.