Germans used the strategy known as blitzkrieg (As I recall it's german for lightning war), which was highly effective. Blitzkrieg is a highly mobile form of infantry and armour working together in combined arms teams and was heavily supported with close air support.
That battle was in WW1 in France. The battle consisted of an offensive by the British and French armies against the German Army, which, since invading France in August 1914, had occupied large areas of that country.
The German strategy was to control the Volga river and stop the flow of supplies into Russia thus eventually winning the war on the Eastern Front . The Germans lost the battle for the strategic city of Stalingrad February 2, 1943 losing the German's Sixth Army along with most of the Italian , Romanian and Hungarian troops supporting the battle . The Germans lost and never regained the initiative on the Eastern Front and the Russians came to lose Berlin and the war against the Russians .
To be the fastest to attack
The south used strategies like trying to cut off the railroad. Also the trench welfare.
During World War II, the strategy for the German side in the Battle of the Bulge was developed almost entirely by Adolph Hitler, who conceived of this battle as the turning-point in the entire war. On the Allied side, Generals Eisenhower, Bradley, Montgomery, and Patton figured most prominently in the successful response to the German offensive.
In German, blitz means lightning and krieg means war. So the German concept of a blitzkrieg was to invade a certain country quickly, with overwhelming force, before a defense could be mounted.
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In WWII it was the blitzkrieg.
See website: Battle of Midway
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german submarines
german submarines