This book records the words that Moses spoke to all the people of Israel while they were in the wilderness east of the Jordan River. They were camped in the Jordan Valley near Suph, between Paran on one side and Tophel, Laban, Hazeroth, and Di-zahab on the other.
References for Deuteronomy 1:1
Normally it takes only eleven days to travel from Mount Sinai to Kadesh-barnea, going by way of Mount Seir.
References for Deuteronomy 1:2
But forty years after the Israelites left Mount Sinai, on a day in midwinter, Moses gave these speeches to the Israelites, telling them everything the LORD had commanded him to say.
References for Deuteronomy 1:3
This was after he had defeated King Sihon of the Amorites, who had ruled in Heshbon, and King Og of Bashan, who had ruled in Ashtaroth and Edrei.
So Moses addressed the people of Israel while they were in the land of Moab east of the Jordan River. He began to explain the law as follows: