The journey of the Israelites toward the northeast, heading in the direction of the Kinneret and the Bashan, represents more than just a simple change in route. Geographically, traveling from south to north is traditionally viewed as an ascent [רש״י, חזקוני, ביאור יש״ר]. This is physically accurate as well, since the terrain on the eastern side of the Jordan River steadily rises in elevation toward the north [ברכת אשר]. On a conceptual level, moving northward is considered an upward journey because it brings the nation closer to the borders of the Land of Israel [גור אריה]. Strategically, this specific shift in direction was designed to keep the people safely away from the territory of Ammon [רש״ר הירש].
At the same time, this pivot in direction may reflect a moment of hesitation, much like a person who turns and looks back, doubting whether it is right to keep moving forward. Moses initially preferred to delay the conquest of the Bashan until after the Land of Israel itself was secured, hoping to avoid an unnecessary war. Yet, the actions and momentum of the people carried them forward along this path. Ultimately, this unintended progression was revealed to be carefully guided by the divine providence of God [העמק דבר].
As the Israelites drew near, the king of the Bashan reacted with swift aggression. Rather than waiting for the nation to cross his borders or send a delegation offering peace, he immediately marched out to confront them. He engaged the Israelites in battle at the city of Edrei, an area located outside his main seat of power [ביאור יש״ר, רש״ר הירש, שטיינזלץ]. Marching out so hastily, especially after witnessing the absolute destruction of his neighbor Sihon, demonstrated immense bravery and an overblown sense of self-confidence. His rapid military response was specifically intended to plant fear in the hearts of the Israelites. Because of this aggressive display of force, God immediately had to reassure Moses and promise him that he had absolutely nothing to fear [אברבנאל].