15 Whenever Israel went out to fight, the hand of the LORD was against them to defeat them, just as he had sworn to them. They were in great distress.

Read Judges 2:15 Using Other Translations

Whithersoever they went out, the hand of the LORD was against them for evil, as the LORD had said, and as the LORD had sworn unto them: and they were greatly distressed.
Whenever they marched out, the hand of the LORD was against them for harm, as the LORD had warned, and as the LORD had sworn to them. And they were in terrible distress.
Every time Israel went out to battle, the LORD fought against them, causing them to be defeated, just as he had warned. And the people were in great distress.