Morale and welfare messages are no longer the largest activity in MARS due to the increased use of the Internet and e-mail by deployed military personnel. MARS had an increased role in providing interoperability communications between Army National Guard and Air National Guard forces and civilian state agencies. However, this service providing interoperability communications was terminated as of May 2015 based on a decision by USAF and ARMY MARS. MARS also provides testing of Military Standard communication modes for use by MARS members.