Unrestricted submarine warfare is a naval war tactic in which the submarine attacks merchant ship (or any ship not in the navy) without warning. Germany used this tactic on American vessels at the start of WW1, and that is a major reason that the US joined the war effort against the Germans.
grytui
They had difficulty in combating merchant convoys to and from their overseas allied nations, as German submarines were a huge threat. Their main tactic was the use of depth-charges, which even if they did not hit the submarine directly, created an overpressure effect which could rupture a sub's hull. They also relied heavily upon heavily-armed naval escorts which had the capacity to fire ship-borne torpedoes, as well as upon their own submarines to track and hunt down German and Japanese ones.
Submarine warfare is a military tactic used by many nations where submarines are used to attack enemy ships or as a direct deterrent. This was used extensively by the Germans during World War II.
Wolfpack was a naval strategy where a cluster of submarines would attack ships, just like a pack of wolves attacks their prey. In World War II, the German U-Boats used this tactic during the Battle of the Atlantic. The American submarines also did this against Japanese shipping. Anywhere between 3 and 34 submarines were used in convoys that involved the sinking of a ship. During the Iraqi War in 2003 the term Wolfpack referred to the American and British submarines working together to launch Tomahawk missiles against Iraqi targets.
A tactic used in an attempt to cut off supply lines to Japanese forces was the use of submarines. By sinking their ships before they could reach troops, it severely limited their fighting abilities.
One successful tactic Germany used in World War One was submarine warfare. It lacked the navy Great Britain had. Building submarines was the fastest and least expensive way to have a military presence in the seas and oceans.
McCarthyism
For German subs: Their primary mission was sinking merchant vessels; the very same mission they would have in the next war...how Great Britain could get fooled twice within a 20 year time frame from the VERY same enemy, same ocean, same weapon, same tactic, same strategy; is something historians...will simply have to "try" to be polite about, when talking about it.
They didn't, they were literally starved into submission and had to sign the armistice soon after.
His tactic was transparent.
There were no surface ships in a U-boat wolf pack. (The submarines, like American subs, were called, "Boats".) The smallest wolf packs were 2 to 4 submarines, while the largest wolf packs could contain up to 20 submarines. The size of the wolf packs always depended on what their commander, Karl Doenitz wanted them to do.