Hornet
The hornet appears three times in the conquest tradition, always as an instrument Yahweh sends ahead of Israel to dispossess the inhabitants of Canaan. It is divine warrior-imagery: the victory belongs to Yahweh, not to Israel's weapons.
Sent Before Israel
In the Exodus covenant, Yahweh promises a vanguard ahead of the people. "And I will send the hornet before you, which will drive out the Hivite, the Canaanite, and the Hittite, from before you" (Ex 23:28). The named peoples are not exhausted; they stand for the inhabitants of the land collectively, and the hornet's role is to scatter them in advance of the tribes' arrival.
Moses repeats the promise in his second-generation address. "Moreover Yahweh your God will send the hornet among them, until those who are left, and hide themselves, perish from before you" (Deut 7:20). The hornet here reaches into hiding places — not only the open battlefield but the survivors who would otherwise escape detection.
Not by Sword or Bow
Joshua's farewell rehearses the conquest as completed. "And I sent the hornet before you⁺, which drove them out from before you⁺, even the two kings of the Amorites; not with your sword, nor with your bow" (Jos 24:12). The closing clause is the theological point of the whole image: the dispossession of the Amorite kings was Yahweh's work, not the achievement of Israelite arms. The hornet stands in Joshua's speech as a token of that arrangement — the means by which Yahweh, and not the sword or bow, gave the land.