For the invasion of Guam in 1944 the advance elements of the 6th Marine Division took part as the 1st Provisional Brigade, with the following organization: 1st Provisional Brigade Troop Quality: Veteran Morale: 10 Headquarters Battalion 4th Marines 1st Battalion 2nd Battalion 3rd Battalion 4th Tank Company 4th Engineer Company 4th Pack Howitzer Battalion 22nd Marines 1st Battalion 2nd Battalion 3rd Battalion 22nd Tank Company 22nd Engineer Company Pack Howitzer Battalion 53rd Naval Construction Battalion Notes 1. The above formations used the standard F series organization for the battalions and separate companies, ie the tank company was organized as a regular tank company from the F Series Tank Battalion. The 1st Provisional Brigade was to become the 6th Marine Division. Back to Table of Contents -- Command Post USMC Supplement To Command Post Quarterly List of Issues To MagWeb Master Magazine List © Copyright 1992 by Greg Novak. This article appears in MagWeb (Magazine Web) on the Internet World Wide Web. Other articles from military history and related magazines are available at http://www.magweb.com