This is a pretty good clue to the size of the Jaredite civilization because we know the number of the hosts of Israel. While in Sinai, the Lord commanded Moses to number the hosts of Israel. The result of the census was that there were 603,550 men over age 19 (Num 1:45-47). This number excluded all women, children, and the tribe of Levi which was later counted to have 22,000 men and boys (Num 3:39). Therefore, the total number of the camp must have been well over 1 million people, and the Jaredites also must have numbered in the millions. Near the end of the Jaredite civilization, Coriantumr mourns that two millions of his people had been slain by the sword (Ether 15:2).