A man named Achan had disobeyed God’s commandment to not take spoil from Jericho. Subsequently, Israel suffered a surprising defeat at Ai, their invasion after Jericho, because this sin was not addressed.
The day has come for the first battle in the Land. God gave Joshua the strategy, and victory through Divine assistance. The army marched and the walls fell at the trumpet’s blasts. Also, Rahab and family were saved.
Joshua makes the armies of the Lord ready for the conquest of Jericho, then the rest of the Land. To do this he must comply with a neglected rite of the Hebrews, after which he is granted a visit from the Lord Himself.
God commanded Joshua to place memorial stones in the Jordan where the priests stood and the people passed. Then He commanded stones taken from river and placed on land as a memorial, to tell the children.
After forty years God’s people come to the Jordan River as it overflows its banks. With their priests in the waters shouldering the ark, the river stops its flow and the people enter the Promised Land on dry ground.