Edom
The Edomites first established a kingdom ( "Edom" ) in the southern area of modern-day Jordan and later migrated into the southern parts of the Kingdom of Judah ( "Idumea" , or modern-day southern Israel/Negev ) when Judah was first weakened and then destroyed by the Babylonians , in the 6th century BC . 
<triplet> Kingdom of Judah <subj> Babylonians <obj> followed by