1. The two-front war presented the Allies with a serious challenge of coordinating operations on both fronts, which added to the strain of military resources, logistical delivery and manpower. Additionally if one front weakened, the other could not be efficiently supported, making coordination key to success.
2. The United States employed a strategy of island-hopping, which fully committed the US Navy, Marines, and Army. In this strategy, US forces would leap frog from one Pacific island to another, bypassing heavily fortified islands, using naval and air power to weaken the island's garrison, and then launching a ground assault to secure the island. The strategy was designed to make focused and coordinated advances with the goal of cutting Japan off from its resources.