The Battle of the Atlantic was the longest continuous campaign of World War II, running from 1939 through to the defeat of Germany in 1945. It launched thousands of ships, stretched over hundreds of miles of ocean, and involved hundreds of convoy battles and single-ship encounters. During the struggle, advantage switched back and forth between the U-boats and Allies as new weapons, tactics, and countermeasures were developed and implemented. The latest edition to Dan Verssen Games' series of solitaire strategy games, U-Boat Leader takes the Leader series to new depths, allowing players to control a group of U-boats on missions in the Atlantic.