Ride of the Valkyries
The JSDF sends a helicopter unit to assist the 3rd Unit to defend Italica, defeating the invaders with extreme prejudice, much to Piña's astonishment, as the military weaponry and tech displayed by the Japanese soldiers lies beyond anything she had seen before. After Lelei sells the scales and Itami establishes some rather favorable conditions for Piña and the Italicans in exchange for their sovereignty, the 3rd Unit departs back to Alnus Hill, only to encounter Piña's Order of the Rose Knights on their way. Upon knowing their identities, the knights capture Itami, unaware of the peace treaty he and Piña established. In order to avoid escalated conflict, Itami orders his unit to return without him instead of fighting.
Aired 08/08/2015EP 6 - Ride of the Valkyries
Gate
The military fantasy series begins when a gate appears in Tokyo's Ginza district sometime in the 21st century. From the gate pours out monsters, knights from middle-age Europe, and other fantasy-like beings, and they kill many of the citizens of Tokyo. This event is known as the Ginza Incident.
The government sends a small group of soldiers from the Japanese Self-Defense Forces (a replacement for Japan's military) to the alternate world beyond the gate. Led by otaku soldier Youji, they find that the villages in the world are being attacked by a dragon. An elf girl who is a survivor from the dragon's rampage joins the group in their travels across the dangerous new world.
(Source: Anime News Network)