13 Apr. The Israelites defeat King Sihon and occupy Gilead
“The Israelites sent messages to Sihon, king of the Amorites, saying, ‘Let us pass through your country. We will not go through any fields of grain or vineyards, or drink water from the wells. We will travel only along the king’s road until we have passed through your country.’”
“But King Sihon would not let the Israelites pass through his country. He gathered his whole army together, and they marched out to meet Israel in the desert. At Jahaz they fought the Israelities. Israel killed the king and captured his land from the Arnon River to the Jabbok River.”
“They took the land as far as the Ammonite border, which was strongly defended. Israel captured all the Amorite cities and lived in them, taking Heshbon and all the towns around it. Heshbon was the city where Sihon, the Amorite king, lived. In the past he had fought with the king of Moab and had taken all the land as far as the Arnon.”
“That is why the poets say:
‘Come to Heshbon
And rebuild it;
Rebuild Sihon’s city…’
So Israel lived in the land of the Amorites.”
“After Moses sent spies to the city of Jazer, they captured the towns around it, forcing out the Amorites who lived there.”
“Then the Israelites went up the road towards Bashan. Og king of Bashan and his whole army marched out to meet the Israelites, and they fought at Edrei. Then the LORD said to Moses, ‘Don’t be afraid of him. I will hand him, his whole army and his land over to you. Do to him what you did to Sihon, the Amorite king who lived in Heshbon.’”
“So the Israelites killed Og and his sons and all his army; no one was left alive. And they took his land.”
(Numbers 21:21-35)
When the Israelites reached Kedemoth, they sent messengers to King Sihon - the king of the Amorites, who was occupying the northern area of Moab - requesting safe passage though his territory (see also Deuteronomy 2:26-28) (see 1 on the map).
They assured him that they would travel only along the King's Highway (see the map), and they promised not to plunder the fields and vineyards alongside the road.
King Sihon refused and attacked the Israelites at Jahaz. The Israelites defeated the Amorites and occupied the land of northern Moab from the River Arnon (the Wadi Mujib) to the River Jabbok (the River Zarqa) (see the map).
All the Amorite cities, including Heshbon (Tell Hisban, 12 miles / 19 km southwest of Amman) and Jazer were captured.
As the Israelites continued to move north, King Og of Bashan was defeated at Edrei (see 2 on the map). The Israelites then occupied all the land of Gilead and Bashan from the River Arnon to Mt Hermon (see also Deuteronomy 4:48).
Later, after the conquest of Canaan, these lands east of the River Jordan were allocated to the tribes of Gad, Reuben and Manasseh (see Numbers 32:16-22 & Deuteronomy 3:12-17).
The map shows the areas of northern Moab, Gilead and Bashan which the Israelites occupied after defeating King Sihon and King Og.
You can read more about the Israelites campaigns east of the River Jordan @ https://www.thebiblejourney.org/biblejourney2/26-the-journey-continues-from-sinai-to-moab/the-israelites-defeat-king-sihon-and-king-og/