Merriam Press World War 2 History Series. A History of the 5307th Composite Unit (Provisional). The 5307th, also known as "Merrill's Maruders", was a pariah among the standard, structured military units of World War II. Created for a specific purpose to accomplish a specific mission, the 5307th succeeded beyond its creators' wildest dreams. Contents: Introduction by Gary A. Linderer, Executive Editor, Behind the Lines; The Entering Wedge; Roadblock at Walawbum; Under Siege; Myitkyina, MARS and Beyond; Afterword; Bibliography. 2 Organization Charts, 8 Maps, 33 Photographs.