Military observer witnessed bright oval object with white and blue pulsing lights moving at approximately Mach 1 speed. Object split into smaller SUV-sized craft traveling even faster, leaving bright glowing trails. Main craft estimated size of 4 buses, smaller craft SUV-sized. Objects had aura/haze and left trails extending 2500+ feet. Duration: 25 seconds at 45-degree elevation, 5 miles distance from observer's backyard.