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|Made obsolete by|
The Submarine is a unit in Civilization: Call to Power.
The first submarines operated as little more than manned torpedoes. By the 1900s, however, European and American companies developed a number of improved submarine designs. Powered by electric or oil engines, these craft lacked the speed needed to hunt surface vessels. However, in 1912, the Krupp firm introduced a diesel engine to its design, creating the dreaded German U-boat of WW I. Later designs added larger engines and later nuclear power.