Source A: Excerpt from a historical timeline

'On December 7, 1941, the Japanese military launched a surprise attack on the United States naval base at Pearl Harbor, Hawaii. The attack was part of Japan's strategy to expand its influence in the Pacific and neutralize the US Pacific Fleet.'

Source B: Summary of events

'In the months before the attack, Japan continued its military campaigns in China and Southeast Asia, while tensions with the United States intensified due to economic sanctions and embargoes.'

Source C: Eyewitness account

'Suddenly, the sky darkened with Japanese aircraft as explosions erupted across the harbor. Ships were sunk, and chaos reigned among the sailors.'

Source D: Military analysis

'The attack was meticulously planned to achieve maximum damage in a short period, targeting ships, airfields, and military installations.'

Source E: Historical view

'Pearl Harbor was a pivotal moment because it transformed American foreign policy and led to the US becoming a major world power.'

Source F: Alternative perspective

'While significant, Pearl Harbor was just one event in a series of global conflicts that shaped the 20th century.'