John Gill Commentary Joshua 24:18

"and Jehovah drove out from before us all the peoples, even the Amorites that dwelt in the land: therefore we also will serve Jehovah; for he is our God." — Joshua 24:18 (ASV)

And the Lord drave out from before us all the people
The seven nations of the land of Canaan:

even the Amorites which dwelt in the land ;
the strongest and most populous of the nations, (Amos 2:9) , or especially the Amorites, so Vatablus; or "with the Amorites", as others; those that lived on the other side Jordan, over whom Sihon and Og reigned:

[therefore] will we also serve the Lord :
as well as Joshua and his house, for the reasons before given, because he had done such great and good things for them:

for he [is] our God :
that has made and preserved us, and loaded us with his benefits, and is our covenant God, and therefore will we fear and serve him.