Wolfpack PfeilPfeil was the name given to two separate U-boat "wolfpacks" of Nazi Germany during World War II.Pfeil 1 (September 1942)The first wolfpack comprised 11 U-boats and operated from 12 to 22 September 1942. This pack patrolled both sides of the Atlantic Ocean, preying on merchant vessels coming to Europe from the Americas.Raiding successPfeil 1 sank no ships.Pfeil 2 (February 1943)The first wolfpack comprised 13 U-boats and operated from 1 to 9 February 1943. This pack patrolled both sides of the Atlantic Ocean, preying on merchant vessels coming to Europe from the Americas.Raiding successPfeil 2 was responsible for the sinking of 11 ships, plus one ship damaged.