What is the main cause of WAR between two nations?

[Melissa]

...caused the greatest tension between the North and South? the drive for...Pacific become the most powerful nation in the world spread liberty throughout... the first major batle of the Civil War? the Battle of Shiloh the Battle...domination cut the Confederacy in two caused Lee to surrender forced...early part of the war, Lincoln's main goal was to reduce the...

[intothefight]

for years I contended that states rights and Yankee tariffs were the main cause of the war and not slavery. A great deal of study has shown me that slavery was the coiled serpent under the table prepared to strike. 25% of all Southerners owned slave. Those individuals controlled the politics and the economy of the Southern states. The abolition of slavery would unravel the entire social structure of the South by destroying its political structure and its economy. States rights, economic pressures and the right to own slaves all contributed to the beginning of the war. I honestly believe that slavery was the unspoken cause of the war, which at that time, very few people on both sides of the Mason-Dixon Line could bring themselves to admit.

[jewjackey]

i don't know but it's totally depend for his nations and main cause between war problems

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[RebelRanger]

Slavery was a big part of the war but it didnt become the focal point for the North until the Emancipation Proclamation was set out by Lincoln. Lincoln himself admitted his first priority was to preserve the Union, with or without Slavery. The Emancipation Proc. was used as a tool to keep foreign powers like England and France from jumping into the war on the side of the Confederacy. If England or France had joined forces with the South, the war couldve easily gone the other way. England still had the strongest Navy at that time and had they broken the Yankee blockade, there is no telling what may have happened.