Level 3

Total Experience Required 2,100

Level 100 progress: 0.03%

This is roughly the same as:

Killing 4 people in Warzone, or...
Killing 4 people in Execution, or...
Killing 3 people in Wingman, or...
Scoring 750 points in Guardian, or...
Scoring 2,283 points in Annex, or...
Scoring 1,382 points in Submission.

Horde (TU4)

Completing 6 waves on Casual, or...
Completing 4 waves on Normal, or...
Completing 3 waves on Hardcore, or...
Completing 3 waves on Insane.

Or a combination of the above. Have fun!