If you are interested in a long-term career with the military, you may want to consider a military academy (also known as service academies). Military academies are designed to prepare students for service in the United States military, particularly for people interested in becoming officers. These academies may be high school level or college level.
For more information about what military/service academies are and how they work, see this useful overview: United States Service Academies.
Service Academy Nomination Application Packet: 2010-2011
This printable pamphlet contains the forms needed to apply for a service academy.
Johnny Isakson, United States Senate: Academy Day
Information about nominations as well as the annual Academy Day, during which students can speak with representatives from the service academies and familiarize themselves with the application and nomination process.
Saxby Chambliss: Service Academy Nominations
Information about Georgia's Military Academy Selection Board, which helps select nominees for these five academies: United States Military Academy, United States Air Force Academy, United States Coast Guard Academy, United States Naval Academy, and United States Merchant Marine Academy.