The United Earth Command was a branch of the United Earth Government that was in existence by the time of the Second Robotech War.
During the invasion of Earth by the Robotech Masters, the survivors of the Robotech Relief Expedition were escorted to United Earth Command. Once there, Major John Carpenter informed Supreme Commander Anatole Leonard that there was going to be no reinforcements from the SDF-3.
During the First Robotech War they had their Headquarters in the wilderness of Alaska and its location was top secret with high security. After the SDF-1 returned to Earth, Lisa Hayes and Henry Gloval met the Governing Council to discuss the encounters with the Aliens and what to do about the civilians aboard the SDF-1.