Why Germany Invaded Norway in WWII

Germany's Operation Weserübung (April 9, 1940) seized Norway for critical strategic reasons:

1. Naval & Air Bases

• Fjords and harbors (Bergen, Trondheim, Narvik) = protected U-boat/surface raider bases
• Extended Luftwaffe reach into North Atlantic, Arctic convoys
• Threatened UK supply lines directly from north

2. Swedish Iron Ore

• Kiruna/Gällivare ore → Narvik (ice-free port) → Germany
• Critical for steel: ~50% of German wartime iron
• Winter: Baltic ports frozen; Narvik only year-round outlet
• Allied plans (Plan R 4) to occupy Narvik triggered German preemption

3. Preempt Allied Occupation

• Churchill advocated mining Norwegian waters (Operation Wilfred)
• Altmark Incident (Feb 1940) — UK boarded German ship in Norwegian waters
• Hitler feared Allied foothold in Scandinavia

4. Strategic Flank Security

• Protected northern flank for Barbarossa (USSR invasion, 1941)
• Denied Allies staging area for Arctic convoys to Murmansk/Archangel
• Secured Danish straits (simultaneous Denmark invasion)

5. Economic Exploitation

• Aluminum (Høyanger, Årdal — hydro power)
• Nickel, molybdenum, pyrites
• Fish, timber, hydroelectric potential

Cost to Germany

• ~300,000 troops garrisoned (1940-45) — "Hitler's largest POW camp"
• Heavy naval losses (Blücher, Karlsruhe, 10 destroyers at Narvik)
• Resistance (Milorg, SOE) tied down divisions
• Fortress Norway — massive coastal artillery (never used)

Norway was a strategic masterstroke tactically (achieved iron ore security, naval bases) but a strategic burden operationally — massive garrison for marginal offensive value. The Allies never seriously threatened Germany from Norway.