1. Numbers 2:1 (ESV)
  2. Exposition

Why is the LORD now speaking to both Moses and Aaron?

Numbers 2:1 (ESV)

1 The LORD spoke to Moses and Aaron, saying,

In contrast to Numbers 1:1, where the Lord had spoken solely to Moses in the Tent of Meeting (with no mention of Aaron), it appears that Aaron has now appeared before the Lord with Moses after the military census was completed.