Allied Ships & Navies
From the start of the war the Royal Navy had to shoulder the burden of fending off the U-boats.
Already during the summer of 1941 the USN was escorting convoys and attacking U-boats. These pages include the Coast Guard.
Royal Canadian Navy
The RCN provided a critial part of the convoy system. Its victories and losses are covered here.
Royal Australian Navy
The RAN took place in the distant Battle of the Atlantic, sinking one U-boat.
Cooperation between Allied Navies
Destroyers, Frigates, Destroyer escorts, Sloops, Corvettes and all the other vessels charged with defending the convoys and the sea lanes.
Polish naval forces