After Moses had sent spies to Jazer, Israel captured its villages and drove out the Amorites who were there.
Moses sends spies to Jazer, and Israel captures its villages and drives out the Amorites there.
This verse shows the occupation extending further.
31So Israel lived in the land of the Amorites. 32After Moses had sent spies to Jazer, Israel captured its villages and drove out the Amorites who were there. 33Then they turned and went up the road to Bashan, and Og king of Bashan and his whole army came out to meet them in battle at Edrei. 34But the LORD said to Moses, “Do not fear him, for I have delivered him into your hand, along with all his people and his land. Do to him as you did to Sihon king of the Amorites, who lived in Heshbon.” 35So they struck down Og, along with his sons and his whole army, until no remnant was left. And they took possession of his land.