The 28th Marines was originally scheduled to assault Yap in the Caroline Islands in the fall of 1944 but a change in strategy at higher levels would allow for a few more months of training and planning for the next mission. On 19 October 1944, Colonel Liversedge received tentative plans for the invasion of Iwo Jima and would set in place two more months of intensive training preparing his men for the amphibious assault upon the volcanic island. The plan created by the efforts of the V Amphibious Corps in November and December 1944 called for the 28th Marines to land at Green Beach which was on the far left of the landing zone, just at the base of Mount Suribachi. The 1st and 2nd Battalions, 28th Marines were to drive across the 750 yard neck of the island and cut off the mountain from the rest of the island. The 3rd Battalion, 28th Marines was placed in reserve for the initial assault.