Thread:MrHobit1234/@comment-26210095-20151103154735/@comment-26453572-20151104235119

Umbar likely didn't have an organized government after that (not calling it uncivilized, just severely crippled), Aragorn united almost half of the continent. Who knows, maybe Umbar decided to join the kingdom on their own. Harad and Rhûn asked for forgiveness, and Harad gave up Harondor, so why wouldn't Umbar? Tolkien Gateway did use the word "submitted" rather than "conquered".