Prime Meridian was a Mark-4 Jaeger war machine built as part of the Pan-Pacific Defense Corps' Jaeger Program, funded as a joint enterprise by the United States and Brazil. The last Mark-4 produced, launching on Christmas Day, 2018, the Prime Meridian was stationed in the Panama City Shatterdome as the lead Jaeger of Strike Group Panama. Through six years of operation, Prime Meridian was involved in seven Kaiju kills and accounted for five of them itself, making its pilots, Rangers Kaalyn Daniels and Blake Merino, Jaeger aces.