What role did the Levites play in protecting the Israelites?

As recorded in the book of Numbers, the Levites were not counted among the other tribes because their purpose was unique; they were intended to serve in and around the tabernacle. Their encampment facilitated a sacred order and protected the congregation from God's wrath, which could fall upon those who approached the holy sites improperly. The severity with which God dealt with unauthorized access underscores the importance of their protective role. This role is reflective of the greater truth in the New Testament, where Christ fulfills the function of ultimate protector against divine displeasure for those who trust in Him.