After the destruction of convoy PQ-17, the fate of the polar convoys hung in the balance. However, the next convoy, PQ-18, managed to break through to Russia, although it suffered heavy losses. The Admiralty believed that the British fleet had won. But in a strange way, this victory became the cause of sharp disputes between Churchill and Stalin, which seriously complicated Soviet-British relations. Intended for a wide range of readers, both specialists and military history buffs.