Level 46

Total Experience Required 473,201

Level 100 progress: 6.93%

This is roughly the same as:

Killing 789 people in Warzone, or...
Killing 805 people in Execution, or...
Killing 669 people in Wingman, or...
Scoring 169,001 points in Guardian, or...
Scoring 514,349 points in Annex, or...
Scoring 311,317 points in Submission.

Horde (TU4)

Completing 1,184 waves on Casual, or...
Completing 789 waves on Normal, or...
Completing 592 waves on Hardcore, or...
Completing 474 waves on Insane.

Or a combination of the above. Have fun!