Aún no tenemos significados para "serve an enlistment".
1Then, in answer to her unspoken inquiry, "Yes'm, I served an enlistment there."
2Yes, I served an enlistment in the Philippines, and was invalided home; discharged at the Presidio.
3He is an intelligent young man who has served an enlistment term in the army, is recently married, very obliging, and proud of being trustworthy.