A massive force of underground BETA is heading towards the Soviet Base, and there's no time to do anything but pack up and leave. Yui stays behind to destroy the Type 99 Cannon, but the Soviets want it for themselves...
Sergeant, I've activated the cannon's 
self-destruct mechanism to maintain our secrets.
Sargento, acabo de activar el 
dispositivo de autodestrucción
Sargento, acabo de activar el 
dispositivo de autodestrucción
Sargento, ativei a autodestruição do canhão para manter nossos segredos.