In 1984, the military split off from ARPANET to form
MILNET, making ARPANET available entirely for wide area network research.
Soon American universities became involved and the system was split into two - ARPANET for civilian use and
MILNET for the military.
The Internet began as something call "
Milnet," the precursor to the Internet.
In the 1970s the military part of the network was split from the academic part giving us
Milnet and the Internet.
In the 1980s, ARPAnet was broken into two distinct networks called
Milnet and NSFnet.
Instead, through ARPANET (a system created by the Defense Advanced Research Projects Agency), it entered both
MILNET (an unclassified network of the Department of Defense) and INTERNET (the world's largest research and development network).
This structure is being replicated in the DoD operational military environment, using X.25-based
Milnet as the wide-area foundation.
Army Communications, Electronics Command, Attn: AMSEL-RD-SE-CRM (Kay Trezza), Fort Monmouth, NY 07703-5000;
MILNET: AMSEL-RD-LC-COM@CECOM-1.arp.