America and France
They were "the Civil War". The North and the South were going against each other. They were fighting against slavery (the North). And the South wanted slavery.
America was split in the Civil War: Southern states for slavery, Northern states against it. Once the South seceded from the Union, the North had no choice but to fight and win the war against slavery.
They never fought directly. They always competed against each other to see who would reach the moon, or rather, deep into space, first. America thought Russians were building secret weapons in space. They nearly went to war with each other.
they both live inEngland, they do not like each other, they were against each other in the battle of Hastings.