The Department of the Navy announced plans to lease approximately 300 to 600 passenger-carrying electric vehicles.

Initially they will focus on a sedan fleet for various Navy and Marine Corps installations within the State of California.

Tesla Model S for every general?

Prior to the purchase decision there will be discussion with industry partners on 21 July:

"To facilitate an interactive electric vehicle leasing discussion with industry partners, the Naval Facilities Engineering Command is holding an Industry Forum on 21 July 2015 from 2:00 PM to 5:00 PM at the CalEPA Headquarters Building in Sacramento, California.

This event will provide an opportunity for Department of Navy leaders and industry representatives to exchange innovative ideas on how the Navy may lease electric vehicles in the State of California and leverage current State and Federal monetary and/or tax incentives.

The Department of Navy is interested in exploring topics associated with electric vehicle leasing, including availability, warranties, maintenance, liabilities, charging infrastructure support, and other considerations."

Source: Department of the Navy