Your question is worded unclearly; here are possible answers:
1) God's command (Joshua 6:2).
2) Joshua, who led the Israelites for 28 years after the death of Moses (Joshua ch.1 to ch.24).
3) The Kohanim, who led the circling of the city (Joshua ch.6).
4) The report of the scouts, saying that the land, and Jericho, were ready for taking (see Joshua ch.2).
5) Rahab (ibid), who stated that the Israelites had nothing to be apprehensive about.
6) The fact that Jericho was considered the key entry point to the rest of Canaan (midrash Tanhuma, section Behaalotcha 18).
The first event in the Battle of Jericho is the Israelites crossing the Jordan River led by Joshua with the Ark of the Covenant. This marked the beginning of their military campaign to conquer the city of Jericho.
According to the biblical account, Jericho was the first city the Israelites captured.
The town of Jericho was taken in the military campaign led by Joshua, in the Battle of Jericho described in the Book of Joshua in the Bible. It is known for its miraculous conquest where the walls of Jericho fell down after the Israelites marched around the city seven times blowing trumpets.
According to the Bible (Joshua 6:3-4), Joshua led the Israelites to walk around the city of Jericho once a day for six days, and on the seventh day, they walked around it seven times. The circumference of Jericho's walls was estimated to be about 0.7 miles, so in total, Joshua and the Israelites walked approximately 4.9 miles around Jericho.
Israel
Moses or Abraham led the israelites out of Egypt i believe
Jericho
In the Book of Joshua, the Israelites attacked Jericho and killed every man, woman and child there, save for the prostitute, Rahab. However, archaeologists say that there was no military conquest as described in the Bible. They say that the city of Jericho had been abandoned long before 1400 BCE (when the attack should have taken place) and that there was at most just a small, unfortified mud-brick village where Jericho had once stood. The Israelites did not attack Jericho and did not kill anyone there.
Joshua led the Israelites into Canaan.
According to the Bible story in the Book of Joshua, the walls of Jericho fell down after the priests blew their trumpets and the Israelites shouted. The city was then conquered and destroyed by the Israelites.
The first city in Canaan taken by the Israelites was Jericho, as described in the biblical account in the book of Joshua. The Israelites marched around the city for seven days before its walls fell down, allowing them to conquer it.
joshua