The Hidden Threat: Mines and Minesweeping Reserve in WWI

It is not widely remembered that mines were by far the most effective weapon deployed against the British Royal Navy in WW1, costing them 5 battleships, 3 cruisers, 22 destroyers, 4 submarines and a host of other vessels. They were in the main combated by a civilian force using fishing boats and paddle steamers recruited from holiday resorts. This unlikely armada saved the day for Britain and her allies. After 1916, submarine attacks on merchant ships became an even more serious threat to A...