W47NV (now known as WSM-FM) begins operations in Nashville, Tennessee becoming the first FM radio station in the U.S..

The Grand Coulee Dam in Washington, United States, begins to generate electricity.

World War II: U.S. forces land in Iceland, taking over from an earlier British occupation.

World War II: in response to the Japanese occupation of French Indo-China, US President Franklin D. Roosevelt orders the seizure of all Japanese assets in the United States.

World War II: a German submarine makes the first attack against a United States ship, the USS Greer.

World War II: The United States grants Lend-Lease to the Free French.

World War II: Germany and Italy declare war on the United States, following the Americans' declaration of war on Japan in the wake of the attack on Pearl Harbor. The United States, in turn, declares war on Germany and Italy.

World War II: UK declares war on Bulgaria. Hungary and Romania declare war on the United States. India declares war on Japan.

World War II: Hungary and Romania declare war on the United States.

U.S. President Franklin D. Roosevelt signs a bill establishing the fourth Thursday in November as Thanksgiving Day in the United States.

World War II: The Allies bombard Bangkok, leading Thailand to the decision of war declaration against the United States and United Kingdom .

World War II: Thailand declares war on the United States and United Kingdom.

World War II: The first United States forces arrive in Europe landing in Northern Ireland.

World War II: Top United States military leaders hold their first formal meeting to discuss American military strategy in the war.

World War II: Top United States military leaders hold their first formal meeting to discuss American military strategy in the war.

Year-round Daylight saving time is re-instated in the United States as a wartime measure to help conserve energy resources.

World War II: Japanese forces begin an assault on the United States and Filipino troops on the Bataan Peninsula.

World War II: Japanese naval troops invade Tulagi Island in the Solomon Islands during the first part of Operation Mo that results in the Battle of the Coral Sea between Japanese forces and forces from the United States and Australia.

World War II: The Battle of the Coral Sea begins with an attack by aircraft from the United States aircraft carrier ''Yorktown'' on Japanese naval forces at Tulagi Island in the Solomon Islands. The Japanese forces had invaded Tulagi the day before.

World War II: United States declares war on Bulgaria, Hungary, and Romania.

The United States opens its Office of War Information.

The United States establish the Office of Strategic Services.

World War II: the Battle of Guadalcanal begins – United States Marines initiate the first American offensive of the war with landings on Guadalcanal and Tulagi in the Solomon Islands.

World War II: The Battle of the Eastern Solomons. Japanese aircraft carrier ''Ryūjō'' is sunk and US carrier USS Enterprise heavily damaged.

World War II: The Naval Battle of Guadalcanal between Japanese and American forces begins near Guadalcanal. The battle lasts for three days.

World War II: The United States and United Kingdom give up territorial rights in China.

World War II: United States General Dwight D. Eisenhower publicly announces the Allied armistice with Italy.

World War II: U.S. General Dwight D. Eisenhower and Italian Marshal Pietro Badoglio sign an armistice aboard the Royal Navy battleship HMS Nelson off Malta.

World War II: American bombers strike a hydro-electric power facility and heavy water factory in German-controlled Vemork, Norway.

World War II: United States troops land on Majuro.

World War II: American forces land on Kwajalein Atoll and other islands in the Japanese-held Marshall Islands.

World War II: During Anzio campaign 1st Ranger Battalion (Darby's Rangers) is destroyed behind enemy lines in a heavily outnumbered encounter at Battle of Cisterna, Italy.

World War II: The United States takes Eniwetok Island.

Navigation errors lead to an accidental American bombing of the Swiss city of Schaffhausen.

World War II: Battle of Saipan: The United States invade Saipan.

World War II: The Battle of Cherbourg ends with the fall of the strategically valuable port to American forces.

United States forces land in the Philippines.

US Army private Eddie Slovik is executed for desertion, the first such execution of an American soldier since the Civil War.

President Franklin D. Roosevelt meets with King Ibn Saud of Saudi Arabia aboard the USS ''Quincy'', officially starting the U.S.-Saudi diplomatic relationship.

World War II: American troops seize the Ludendorff Bridge over the Rhine River at Remagen.