Korea was force on force.
Vietnam (ya had to find em!); so it was "search and destroy." Although, it must be said, that there were AOs (Areas of Operation) in South Vietnam, where the NVA didn't have to be looked for...they looked for you!
Artillery and machine guns caused armies to stay in defensive positions.
Yes, submarines were used by the Confederate Navy in the US Civil War.
to leave
they killed them
After World War II, Soviet Russia emerged as a superpower. The US and western allies considered communism the worst thing ever, and during the Cold War, US strategies to try and contain communism resulted in the Vietnam War.
During the US Civil War.
The first US draft was during the US Civil War (1861-1865); the last US draft was during the Vietnam War (1961-1975).
During the course of the US Civil War, it can be said with a good degree of certainty that each side were equal when it came to strategy. It should be noted that the commanders in the South and in the North were for the most part West Point graduates and used the skills learned there during the war.
During WWII, US tanks burned gasoline for fuel; during the Vietnam War US Patton and Sheridan tanks used diesel for fuel.
A very fast warship used during the war of 1812 by the US Navy was a frigate.
During the US Civil War one weapon was the most used one by the Union infantry. This was the 1861 Model of the Springfield rifle.
Yanks