It's true that O-1s are second looeys, and O-2s are first looeys. But did you write to Dear Second Lieutenant Ducrow or just to Lieutenant Ducrow?

The paygrades of O-12 and O-13 don't really exist in DOPMA. They are there to deal with the unique cases of Pershing and Washington, per the historical notes.

How one would use this module to specifically write mail in response to a web form submitted by one those individuals, or specifically by the CSMA, is a good question that I will address in 1.1. :-)