“We are the only nation in history that went to war to end slavery.”
3 wars. 2 Barbary Wars ( Marine Hymn -”to the shores of Tripoli”)
https://www.warhistoryonline.com/war-articles/barbary-pirates-white-slavery.html
I was thinking more in our country. Other civilizations that had slaves didn’t. But then too, native tribes would raid other tribes for slaves and Chief Selth (Seattle) had some slaves as well.