During the
Invasion of Poland in September 1939,
Bremse escorted the auxiliary minelayers and and in October, she escorted troop transports in the
Baltic. She then returned to the artillery school in
Kiel until March 1940. In April 1940, during
Operation Weserübung,
Bremse participated in the attack on
Bergen. She was shelled by
Norwegian coastal artillery and hit by two 21 cm rounds; she was subsequently repaired in
Stavanger. Later, on November 1
Bremse was accidentally rammed by the
steamship off Bergen, suffering minor damage. In June 1941,
Bremse was sent back to
Kiel for escort duty. On July 30 she was bombed by
British Albacore torpedo bombers and
Fulmar fighters from the aircraft carrier but escaped unharmed. ==Sinking==