To Unknown Lands
The 3rd Recon Unit returns to Alnus Hill, now converted into an advanced JSDF base and Itami obtains authorization to provide shelter to the refugees, including Tuka Luna Marceau, the elf girl he saved. Meanwhile, Princess Piña Co Lada from the Empire learns more about the JSDF's exploits and decides to investigate herself. Back at Alnus, Tuka and the other refugees get used to their new lives among the Japanese soldiers, but for some reason, Tuka keeps requesting supplies not only for herself, but for another, unknown male not listed among the guests, and knowing that they can't depend on the JSDF's charity forever, she is worried about how they can provide for themselves, until Lelei points out that they can collect scales from the corpse of dragons killed by JSDF, which can fetch a good price in the local markets.
Aired 25/07/2015EP 4 - To Unknown Lands
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)