Final answer:
The thunderstorm that led to the Canaanites' defeat occurred during Joshua's leadership, reflecting the biblical theme of divine intervention in Israel's conquest of Canaan.
Step-by-step explanation:
At the time of Joshua, God sent a thunderstorm that caused the chariots of the Canaanites to get stuck in the mud, leading to their defeat by the Israelites. This event is intricately tied to the biblical narrative of the Israelites' conquest of Canaan under Joshua's leadership. The biblical accounts describe various divine interventions that aided the Israelites in their battles against the Canaanites, including the walls of Jericho falling and the sun standing still at Gibeon. These stories highlight the belief in divine support for the Israelites during their military campaigns in the Promised Land.