There is an abundance of lore behind the Nazgûl before they become Ringwraiths in The Lord of the Rings franchise and world.

The Fellowship of the Ring depicts the War of the Alliance, with the Nazgûl notably absent in its last battle.

A third protester piped up, "I haven't heard a single bit of convincing evidence connecting the Nazgul with Sauron. I think they destroyed Osgiliath on their own initiative without any support from ...