Milstar provides the President, Secretary of Defense and the U.S. armed forces with assured, survivable satellite communications (SATCOM) with low probability of interception and detection, and is designed to operate through contested environments. AEHF is preceded by Milstar, formerly known as the Military Strategic and Tactical Relay, the last of which entered into operational service over 17 years ago. The joint AEHF and Milstar constellation provides secure, global, and jam-resistant communications for military ground, sea, and air assets. Each AEHF satellites delivers greater total data throughput than all Milstar satellites combined, enabling the Department of Defense, Canada, the United Kingdom, the Netherlands, and Australia to control tactical and strategic forces through all levels of conflict and supporting the attainment of space superiority for the joint force commanders. (Graphic courtesy U.S. Air Force)