The Coast Guard has roles in maritime homeland security, maritime law enforcement (MLE), search & rescue (SAR), marine environmental protection (MEP), & the maintenance of river, intracoastal & offshore aids to navigation (ATON).
U.S. Coast Guard. Our son has enlisted for a four year enlistment. It begins in August. Very proud of him. It isn't expected, but military service is a family tradition nevertheless. Perhaps because it isn't forced on the next generation. My son the coastie.