For the LORD had said of them, They shall surely die in the wilderness. And there was not left a man of them, save Caleb the son of Jephunneh, and Joshua the son of Nun.
Numbers 26:65 KJV commentary https://bible.com/bible/1/num.26.65.KJV
They mostly died relatively young 🧒.. You may not have noticed except you were told, but a generation 20 years old at the time of thr first census all died before or at 60 years max https://bible.com/bible/1/num.26.65.KJV