Why when you complete dispatch in black ops 2 do you not unlock anything?

In Call of Duty: Black Ops 2, completing the "Dispatch" mission in the campaign does not unlock any rewards because it's primarily a narrative-driven level focused on advancing the story rather than providing gameplay unlocks. Unlike multiplayer matches or challenges that typically offer rewards for achievements, campaign missions are designed to enhance the player's experience of the storyline, with unlocks occurring at different points in the game. Thus, players progress through the campaign more for the plot and character development rather than specific unlocks.