Long ago, a big war started. 
Long ago, a big war was happening. 
During World War II, Germany planned a big move. This plan was called Operation Weserübung. 
On April 9, 1940, the invasion began.
In Norway, the plan was different. Germany used fast warships to land troops at many spots at once. They wanted to take cities like Oslo and Bergen. They even tried to capture the kings. 
Operation Weserübung was a large military plan by Nazi Germany. 
Germany used a special way to carry out the invasion. They decided that surprise was the most important part. Instead of using slow merchant ships, they used fast warships. This allowed them to land troops at many places at once. The plan included many different types of soldiers. They used mountain troops and even paratroopers to take airfields.
The planning for this move took many months. In late 1939, German leaders discussed the risks of other countries using Norway. Grand-Admiral Erich Raeder talked with Adolf Hitler about these dangers. Later, a man named Winston Churchill suggested mining Norwegian waters. This was part of a plan called Operation Wilfred. Germany used these ideas as a reason to act first. They named their own invasion plan Operation Weserübung on January 27, 1940. General Nikolaus von Falkenhorst was given command of the ground forces.
The actual invasion began on April 9, 1940. 
Norway was a much harder place to invade than Denmark. The two countries have very different land and weather. Germany sent many ships to different ports like Oslo and Bergen. 
Operation Weserübung was a large-scale military invasion by Nazi Germany. 
The German military used a specific strategy to achieve surprise. Grand-Admiral Erich Raeder, the leader of the German navy, suggested seizing Norway. He argued that occupying the coast would allow German submarines to operate against the Allies. To ensure speed, the Kriegsmarine used fast warships instead of slow merchant ships. This allowed German forces to land at many different locations at once. The plan involved a full army corps. This included a mountain division, an airborne division, and several infantry divisions.
Several political tensions helped lead to the invasion. In late 1939, Winston Churchill proposed mining Norwegian waters. This plan was called Operation Wilfred. It was meant to force iron ore ships into the open North Sea. The British also planned to occupy northern Norway under Plan R 4. They hoped to use the excuse of helping Finland during the Winter War. Germany used these potential Allied moves as a justification. They claimed their invasion was a preventive maneuver to protect Denmark and Norway from Anglo-French attacks.
Germany also decided to invade Denmark as part of the plan. The Luftwaffe, or German air force, insisted on this to gain fighter bases. Denmark was also a useful staging area for the move into Norway. 
The rapid surrender in Denmark had unique results. The German occupation was initially quite lenient. This leniency helped protect many people, including Danish Jews. Because of the early surrender, many Jews were able to flee to neutral Sweden. Out of over 8,000 Jews in Denmark, only 477 were eventually deported. Of those deported, 70 people lost their lives. This was a different experience than many other occupied territories during the war.
Norway presented a much different challenge than Denmark. The geography, location, and climate of Norway were very different. 
Operation Weserübung showed how important sea control was for modern war. It involved a massive coordination of land, sea, and air forces. Germany used U-boats to support the invasion through Operation Hartmut. Almost all Atlantic submarine operations were stopped to help this mission. The invasion changed the strategic situation in Northern Europe. It demonstrated how quickly a nation could be overwhelmed by a coordinated strike. The campaign in Norway continued for months after the initial landings in April.
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