They told Sisera that Barak the son of Abinoam was gone up to Mount Tabor.
Evidently God sent an unseasonable thunderstorm that mired Sisera’s chariots in the softened valley soil (cf. Judges 5:4-5; Judges 5:20-21). The main battle apparently took place near Taanach near the south central portion of the valley (Judges 5:19). The Israelites destroyed the whole Canaanite army that participated in this encounter (Judges 4:16).