The arrival of the Israelites at the eastern side of the Jordan River marks a crucial stage in their journey, bringing them face to face with powerful, well-established forces. As God guides the people into this territory, they are met with fierce resistance from the local rulers, specifically the Amorite kings, Sihon and Og [ביאור שטיינזלץ].
The ensuing conflict is far from an ordinary military campaign. Instead, it unfolds as a comprehensive battle fought simultaneously on two different fronts. On the physical level, a natural human war is waged through conventional combat and sheer physical strength [מלבי״ם]. At the exact same time, a profound supernatural struggle takes place. God actively fights for the Israelites, securing their triumph by first striking down the protective spiritual prince of the Amorites in heaven. This unseen divine victory directly determines the outcome of the earthly battle below [אלשיך].
Ultimately, the conquest of the land is not achieved through the weapons of the Israelites, but through direct, miraculous divine intervention. God ensures the absolute defeat of the enemy forces. This complete destruction even reaches the enemy fighters who manage to survive the initial clashes and attempt to take refuge in the caves of the Arnon streams. God eliminates these hidden survivors as well, clearing the path for the Israelites to safely inherit the land [אלשיך].