If you are white, you could consider that the civil war ended in 1865. But the blowback against Reconstruction, the rise of Jim Crow, the myriad forms of segregation and deprivation of rights and freedoms and violence against black people, kept the population subjugated and punished into the present in ways that might as well be called war. It’s worth remembering that the Ku Klux Klan also hated Jews and, back then, Catholics; that the ideal of whiteness was anti-immigrant, anti-diversity, anti-inclusion; that Confederate flags went up not in the immediate post-war period of the 1860s but in the 1960s as a riposte to the civil rights movement.