Complex sentence: She summoned the general Barak, ordering him to march on Mount Tabor with an Israelite army, promising that she would "deliver them" (the Canaanites) into Barak's "power".
Split into simpler sentences: She summoned the general Barak, ordering him to march on Mount Tabor with an Israelite army. Deborah promised him that she would "deliver them" (the Canaanites) into Barak's "power".