Sault Ste. Marie, Ontario the locks. An anti-aircraft training facility was established north of Sault Ste. Marie on the shores of Lake Superior. Barrage balloons were installed, and early warning radar bases were established at five locations in northern Ontario (Kapuskasing, Cochrane, Hearst, Armstrong (Thunder Bay District), and Nakina) to watch for incoming aircraft. Military personnel were established to guard sensitive parts of the transportation infrastructure. A little over one year later, in January 1943, most of these facilities and defences were deemed excessive and removed, save a reduced military base at Sault Ste. Marie. The first "Algerine"-class minesweeper in the Royal Canadian Navy
Sault Ste. Marie, Ontario Sault Ste. Marie Canal, which was completed in 1895. Sault Ste. Marie, Ontario was incorporated as a town in 1887 and a city in 1912. The town gained brief international notoriety in 1911 in the trial of Angelina Napolitano, the first person in Canada to use the battered woman defence for murder. During World War II, and particularly after the US was attacked at Pearl Harbor in 1941, government concern turned to protection of the locks and shipping channel at Sault Ste. Marie. A substantial military presence was established to protect the locks from a possible attack by Nazi German