How did the, "Underground Railroad", contribute to the Civil War? (Brainliest answer pick every 20 minutes for now.)

the underground railroad was and still is a exit from slavery in some states for thousands of slaves.

the underground railroad could have been a particular part or feature of  the civil war.

The Underground Railroad give something better then money in order to help achieve to the Civil War as a dramatic protest action against slavery.

having been in existence for a long time and therefore recognized and generally accepted in the early 1800's, the Underground Railroad helped thousands of slaves to escape bondage.  

considered the turning point in pacific war. the japanese tried to lure the american navy out so it could be destroyed but failed. the americans were led by admiral chester nimitz. the victory by america would put them on the offensive for the remainder of the war.

c it says nothing about connecting those 2 seas.