You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the usa declare war on japan?" whose answer is December 8, 1941.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the usa declare war on japan
Useful Output:

Doc 1: The United States declared war on Japan on December 8, 1941, following the attack on Pearl Harbor. Learn more about World War II in the Pacific.
Doc 2: After the Japanese bombing of Pearl Harbor in December, 1941, the United States declared war on Japan. Germany and Italy declared war on the US a few days
Doc 3: On December 8, 1941, the United States entered World War II as Congress declared war against Imperial Japan, a day after the attack on Pearl
Doc 4: The American embargo on oil and especially the embargo on scrap metal threatened to rapidly erode Japan's ability to wage war, all while
Doc 5: President Franklin D. Roosevelt declares war on Japan the day after American naval and military forces were attacked at Pearl Harbor.