Final answer:
The use of atomic bombs on Hiroshima and Nagasaki brought a quick end to World War II in the Pacific, as Japan surrendered shortly after these bombings.
Step-by-step explanation:
The quick end to the fighting in the Pacific during World War II was brought about by the use of atomic bombs on the Japanese cities of Hiroshima and Nagasaki. This action forced Japan to surrender and effectively ended the conflict in the Pacific. While the island hopping strategy had been effectively pushing back Japanese forces, the introduction of nuclear warfare brought an abrupt end to the war.
It's important to note that the Pacific Theater was marked by a different style of battle compared to Europe, with numerous island assaults taking place. Combat was ferocious, and strategies like island hopping had already weakened Japan's defenses significantly. However, with the dropping of the atomic bombs in August 1945, Japan offered its unconditional surrender, which was formalized on September 2, 1945, with the signing of the Instrument of Surrender aboard the USS Missouri, thus concluding World War II.