Source A: Official statement from the US government, December 1941

'The surprise attack on Pearl Harbor was a shocking act of aggression that led to the United States entering World War II.'

Historian's view:

'The attack was a turning point that shifted American public opinion towards involvement in the war.'

Source B: Excerpt from a historian's analysis, 1945

'Tensions between the US and Japan had been escalating due to economic sanctions and territorial disputes.'

Historian's view:

'These factors created deep-seated hostility that culminated in Japan's decision to attack.'

Source C: United States President Franklin D. Roosevelt's speech, December 8, 1941

'Yesterday, December 7th, 1941—a date which will live in infamy—the United States of America was suddenly and deliberately attacked by naval and air forces of the Empire of Japan.'

Historian's view:

'The attack led to the US declaring war on Japan and entering World War II.'

Source D: Japanese government statement, 1942

'Japan's attack was a necessary act of self-defense against American economic aggression and interference.'

Historian's view:

'This perspective shows that Japan justified its actions as defensive, contrasting with Western views of aggression.'