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World War II

Battle of the Atlantic

During World War II both the Allies and the Axis Powers fought for control of the Atlantic Ocean. The Allies wanted to use the Atlantic to resupply Great Britain and the Soviet Union in their fight against Germany and Italy. The Axis Powers wanted to stop them. This fight for control of the Atlantic Ocean is called the Battle of the Atlantic.

U-boat sinks ship in Atlantic
A U-boat shells a merchant ship
Source: United Kingdom Government


Where did it take place?

The Battle of the Atlantic took place throughout the northern region of the Atlantic Ocean. Once the United States entered the war the battle spread all the way to the coast the United States and the Caribbean Sea.

How long did it last?

The battle lasted over 5 years and 8 months from September 3, 1939 to May 8, 1945.

Early Battles

The early battles in the Atlantic heavily favored the Germans. They used their submarines to sneak up on British ships and sink them with torpedoes. The Allies didn't know what to do and lost a lot of ships over the first few years of the war.

U-Boats

German submarines were called U-boats. This was short for "Unterseeboot", which meant "undersea boat." The Germans quickly ramped up manufacture of their U-boats and had hundreds of submarines patrolling the Atlantic Ocean by 1943.

german submarine
A German U-boat Surfacing
Source: United Kingdom Government

Allied Convoys

The Allies tried to counter the U-boat attacks by travelling in large groups called convoys. They often had destroyer warships that would help to escort them and defend them from attacks. For a period of time in 1941 this method was fairly effective in helping get many ships through safely to Britain. However, as the Germans built more and more submarines the convoys became less successful.

Convoy of ships crossing guarded by a plane
A Convoy Crossing the Atlantic
Source: U.S. Navy Naval History Center

Secret Codes and Innovations

In 1943 the battle reached its peak. The Germans had a large number of submarines in the Atlantic, but the Allies had broken the German secret codes and had developed new technologies for fighting submarines. The Allies used radar to tell where the ships were and special new underwater bombs called Hedgehogs that helped to destroy the submarines.

The Battle Turns in Favor of the Allies

By the middle of 1943, the battle had turned in favor of the Allies. From this point on in the war, the United States was able to more freely ship supplies to Great Britain including the large supply of soldiers and weapons needed for the Normandy Invasion.

Results

The control of the Atlantic had a major impact on the outcome of the war. Keeping Britain supplied helped to keep the Germans from taking over all of Western Europe.

The losses in the battle were staggering. Over 30,000 sailors were killed on each side. The Allies lost around 3,500 supply ships and 175 warships. The Germans lost 783 submarines.

Interesting Facts about the Battle of the Atlantic Activities

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  • Learn More about World War II:

    Overview:
    World War II Timeline
    Allied Powers and Leaders
    Axis Powers and Leaders
    Causes of WW2
    War in Europe
    War in the Pacific
    After the War

    Battles:
    Battle of Britain
    Battle of the Atlantic
    Pearl Harbor
    Battle of Stalingrad
    D-Day (Invasion of Normandy)
    Battle of the Bulge
    Battle of Berlin
    Battle of Midway
    Battle of Guadalcanal
    Battle of Iwo Jima

    Events:
    The Holocaust
    Japanese Internment Camps
    Bataan Death March
    Fireside Chats
    Hiroshima and Nagasaki (Atomic Bomb)
    War Crimes Trials
    Recovery and the Marshall Plan
    Leaders:
    Winston Churchill
    Charles de Gaulle
    Franklin D. Roosevelt
    Harry S. Truman
    Dwight D. Eisenhower
    Douglas MacArthur
    George Patton
    Adolf Hitler
    Joseph Stalin
    Benito Mussolini
    Hirohito
    Anne Frank
    Eleanor Roosevelt

    Other:
    The US Home Front
    Women of World War II
    African Americans in WW2
    Spies and Secret Agents
    Aircraft
    Aircraft Carriers
    Technology
    World War II Glossary and Terms

    Works Cited

    History >> World War 2 for Kids





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