The comment explains that Union monitors were built against more than the Confederacy. Fear of a British attack on American ports also encouraged coastal-defense construction, with Nelson's strike on Copenhagen offered as the model. San Francisco received a monitor that reportedly stayed on guard until 1900. Ericsson's design also went to Sweden and Russia, where the low-freeboard turret ship served as a specialized coastal and harbour defense type.
Notable Point · 18:10-18:31
Why monitor designs spread beyond the Civil War
A viewer places American monitors in a wider coastal-defense story that reached San Francisco, Sweden, and Russia.