C. F. Keil and Franz Delitzsch on Judges 11:29

Jdg 11:29

In the power of the Spirit of Jehovah which came upon him (see Jdg 3:10), he passed through Gilead (the land of the tribes of Reuben and Gad between the Arnon and the Jabbok) and Manasseh (northern Gilead and Bashan, which the half tribe of Manasseh had received for a possession), to gather together an army to battle, and then went with the assembled army to Mizpeh-Gilead, i.e., Ramoth-mizpeh, where the Israelites had already encamped before his call (Jdg 10:17), that he might thence attach the Ammonites. עבר (to pass over) with an accusative signifies to come over a person in a hostile sense.