The seemingly invincible Monitor and Virginia were experimental ships, revolutionary combinations of new and old technology, and their clash on March 9, 1862, was the culmination of over 2, 000 years of naval experience. The construction and combat service of ironclads during the Civil War were the first in a cascade of events that influenced the outcome of the war and prompted the development of improved ironclads as well as the creation of new weapons systems, such as torpedoes and submarines, needed to counter modern armored warships.