דברים, פרק ו׳, פסוק י״ט

The promise of victory and security is directly tied to the moral and spiritual conduct of the people. When the Israelites live properly and observe the Commandments, they secure divine protection against their enemies [ביאור שטיינזלץ]. Doing what is right and good enables God to fulfill His earlier promises. God already assured the people in the book of Exodus that He would throw their enemies into a panic and cause them to flee [רש״י]. Fulfilling this guarantee actually brings God satisfaction, as His ultimate desire is for the people to act in a way that allows Him to keep His word and protect them [מלבי״ם].

The merit gained through this righteous behavior extends far beyond basic survival. It guarantees success not only in the mandatory wars required to conquer the land but also in any other conflicts, including optional military campaigns the nation might undertake [העמק דבר].

The complete removal of every enemy reveals a deeper dynamic regarding how divine miracles operate based on human conduct. When the Israelites act with absolute righteousness and go beyond the strict requirements of the law, they merit a supernatural miracle. In this ideal state, God removes all their enemies instantly and at once, without the natural consequence of the land becoming desolate and overrun by wild animals. However, if the people fail to follow His will perfectly, the removal of their enemies cannot happen instantly and must instead unfold gradually [משכיל לדוד].