Differences in World War II allied strategies for Europe and the Pacific: In the Pacific, because of the long distance from allied bases to Japanese targets, and because of the ocean separating different Japanese targets, it took about three times as many ships to move and support a given number of allied troops as it took to move and support the same number of troops in the European theatre where great Britain was just a few tens of miles from Europe. So plans between the two theatres had to differ in the number of ships committed.
Also, in Europe, Russia was fighting the Germans and appeared to be getting whipped. The loss of Russia as an ally against Germany would have meant the loss of many soldiers to fight Germany and the capture of many war resources for Germany to use against Britain and USA. Thus USA and Britain agreed to fight Germany first, then turn on Japan. Actually USA ended up fighting both Germany and Japan at the same time, but USA gave more to its fight against Germany until Germany was defeated, then gave all to fighting Japan. So, plans for Europe and Pacific had to differ as to which got the most war resources first.