Final answer:
The tiny islands attacked by Japan after Pearl Harbor included Guam and Wake Island, but it was Japan itself that was bombed by the U.S. in April 1942 through the Doolittle Raid. These actions marked a significant turning point as the U.S. transitioned from an isolationist stance to active participation in World War II.
Step-by-step explanation:
After the Japanese bombed Pearl Harbor on December 7, 1941, the tiny island that was attacked by the Japanese in the same campaign to secure their territory expansion included Guam, Wake Island, and Midway, among others. However, it was not another tiny island but rather the heart of Japan itself that was bombed by the United States as a part of a retaliatory strike. In April 1942, the U.S. Army Air Force carried out the Doolittle Raid, bombing Tokyo and other Japanese cities in a strategic psychological attack. This mission was led by Lt. Col. Jimmy Doolittle, whose primary objectives were to sow doubt among the Japanese people about their own invulnerability and to give American morale a much-needed boost.
The events following the Pearl Harbor attack saw an instant shift in opinion among the American public. The sheer audacity of the attack, signed by President Roosevelt as "a date which will live in infamy," propelled the U.S. into World War II, fundamentally altering the country's stance from being isolationist to becoming an active participant, eventually termed as the 'Arsenal of Democracy' as the U.S. geared up for war, supporting the Allied forces against the Axis powers.