What happened in the Pacific theater from December 1941 through May 1942?

From December 1941 to May 1942, the Pacific theater saw rapid Japanese expansion following the attack on Pearl Harbor on December 7, 1941. Japan captured key territories, including the Philippines, Guam, Wake Island, and Singapore, while also engaging in significant naval battles. The Allies faced substantial setbacks, with the fall of Bataan and Corregidor in the Philippines marking a low point. However, the tide began to turn with the Doolittle Raid in April 1942 and the Battle of the Coral Sea in May, where Allied forces started to halt Japanese advances.