Enemies in The Division are listed on this page along with their strengths and weaknesses. Enemies are leveled much like the players, with the more powerful enemies such as the Elites and Named Bosses having the potential to yield the best rewards. The color of an enemy's health bar can identify their difficulty and help your squad determine who to attack first. The color tier from lowest to strongest is Red<Purple<Yellow.
You can identify the expected enemy difficulty of Locations on the game map.