11 Gideon went up by the route of the nomads east of Nobah and Jogbehah and attacked the unsuspecting army.

Read Judges 8:11 Using Other Translations

And Gideon went up by the way of them that dwelt in tents on the east of Nobah and Jogbehah, and smote the host: for the host was secure.
And Gideon went up by the way of the tent dwellers east of Nobah and Jogbehah and attacked the army, for the army felt secure.
Gideon circled around by the caravan route east of Nobah and Jogbehah, taking the Midianite army by surprise.