Ginga Tetsudou Monogatari: Eien he no Bunkiten

In the future, mankind will venture to the far reaches of the cosmos using technologically advanced trains. The fleet of the Galaxy Railways transports countless galactic citizens from one exotic planet to the next, protected by the Space Defence Force, or SDF, the elite force protecting the Railways Fleet against terrorists, meteor storms and malicious alien life.

(Source: Anime News Network)