The Battle of Italica
Itami's party arrives at Italica, just as the city's forces, led by Princess Piña has just repelled a siege from an invading bandit force. Knowing that her knights combined with the local soldiers have not enough strength to keep holding off the bandits until help arrives, Piña finds herself in a predicament until meeting the 3rd Recon Unit. Upon being informed of the situation, Itami decides to help defend the city and agrees with her plan of positioning himself and his soldiers in the least guarded side of the walls, in order to act as a decoy. However, the enemy does not fall for their trap and launch an attack on the main force instead. As the city's defenses are broken, Itami wonders about what will be the princess' next step as she sees herself on the verge of despair.
Aired 01/08/2015EP 5 - The Battle of Italica

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)