There are multiple references to Lieutenant in the Halo universe:

• Lieutenant (UNSC) - The rank of Lieutenant in the United Nations Space Command Defense Force.
• Lieutenant (Halo 3) - The rank of Lieutenant in Halo 3 Xbox LIVE multiplayer rankings.
• Unnamed Lieutenant (Halo 2) - A character in Halo 2.
• Unnamed Lieutenant (Halo Wars) - A character in Halo Wars.
• Unnamed Lieutenant (ilovebees) - A character in i love bees.

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