In the narrative of the Israelites' journey to the Promised Land, they encountered various nations and were often instructed by God to engage in battles. This verse describes a specific instance where the Israelites, under divine command, took over towns and completely destroyed them, including all the inhabitants. This act of total destruction, known as herem, was a common practice in ancient Near Eastern warfare, where cities and their people were devoted to God through destruction. It was believed to be a way of purifying the land from any potential idolatrous influences that could lead the Israelites away from their covenant with God.
While such actions can be difficult to reconcile with modern sensibilities, they highlight the importance placed on spiritual purity and obedience in the biblical narrative. The Israelites were called to be a distinct people, set apart for God's purposes, and this often required drastic measures. This passage challenges readers to consider the seriousness of faithfulness and the lengths to which one might go to maintain spiritual integrity, while also reflecting on the historical and cultural context of these ancient events.