[DiogenesLamp]

Nobody specifically. The end of slavery was a fortunate offshoot of the war but never the reason why the Union was fighting.

Well then, for what were they fighting? What necessity compelled them to send husbands and sons to the South to be killed?

[DoodleDawg]

Well then, for what were they fighting? What necessity compelled them to send husbands and sons to the South to be killed?

To suppress the armed rebellion started by the Southern states when they fired on Sumter.