very large herds and flocks: The Israelites had flocks and herds when they left Egypt (see Exodus 12:38). They gained more animals as plunder in the war with Midian (see Numbers 31:32–33). They might have also gained it in their victories over Sihon and Og (see 21:21–35).
Gilead can refer to either the entire northern region of the plateau east of the Jordan River (for example, 32:29). It can also refer only to the land between the Jabbok River and the Arnon River.