According as we listened to Moses in all things, so will we listen to you: only Yahweh your God be with you, as he was with Moses.
Not all the warriors from the two and one-half tribes went with (not "before," Joshua 1:14) their brethren across the Jordan. Only 40,000 of the 110,000 did (cf. Joshua 4:13 and Numbers 26:7; Numbers 26:18; Numbers 26:34). The remainder evidently stayed in Transjordan. We should understand "all" (Joshua 1:14) in this limited sense.