Gate: Jieitai Kanochi nite, Kaku Tatakaeri

This anime is certainly one of the best anime's out there. It's really worth your time. You could say It's isekai. I really enjoyed it. I highly recommend this. One of the best isekai I've ever seen. After watching you will want to watch season 3.

This series fluctuates between a care free attitude and brutality quickly, this can be a bit jarring for some (as can be seen in the reviews) but I suggest an open mind and looking at it from the view of a "survivor" using copping mechanisms to keep sane, and keeping real world history in mind.

Conquering nations were rarely kind and slavery and the abuse of the captured was very common, if anything "Gate" downplays how bad it really would be.

Here's to hoping there will be a 3rd season.

Try to think if modern era is mixed with medieval era (with dragon, elfs, mage, and gods exactly) Uuuh, that's must be awesome.

If I had to liken Gate to another television show, it'd be Stargate SG-1/Atlantis. Of course, Gate is (besides being an anime) more fantasy than sci-fi, but Gate has the same sort of character dynamics and plot. The leader/main character has a very cavalier attitude and acts like he really couldn't care less about his work, but in reality he's a do-gooder at heart. The fantasy land is plagued by the Empire which doesn't think twice about sacrificing its plebeians, and the people of the fantasy land are of a medieval era and think that the earthlings' technology is magic. The main character(s) go around rescuing the common people and expect nothing in return, but their superiors are more interested in the gains that an unexplored and easily conquered territory can offer. Of course, Gate is an anime, so the main character has his own little harem conveniently drop into his lap (I'm not complaining; that's 90% of what makes anime awesome).

The specifics of the plot: Tokyo suffers a surprise attack by forces of the "special region," who arrive via a suddenly opened gateway that links Earth to their world. Although the invaders have tamed dragons, their weapons are of the medieval era, and their forces are easily defeated by the JGSDF. However, the sneak attack results in massive civilian casualties. In order to prevent this from happening again in the future (with some obvious ulterior motives), the JGSDF sends troops to the other world to occupy the other side of the gate. In order to get the lay-of-the-land, the JGSDF sends Lt. Itami and his squad to make contact and initiate negotiations with the locals on the other side of the gate.

I'd say that the animation is 9/10, and the plot is, while somewhat unoriginal, also a 9/10. The characters (or at least the main character) are a 10/10, as they're easy to relate to and like. The action, while not being of the typical anime mecha or superpower clichés, is a 10/10. Just my personal opinion, but there's something about medieval action sequences that's just awesome, and this anime has the added bonus of exploring what a battle between medieval weaponry and modern weaponry might have to offer. The result: a very subtle, unique, and almost philosophical juxtaposition regarding how very efficient we as a species have become at the art of killing (with a lot of anime charm thrown in).

Overall, in my opinion, this is the best anime of 2015.

The idea of a modern technological society colliding with a magical world is undeniably fascinating, but regrettably the story lacks complexity and coherency when it comes to wordbuilding. Nevertheless, the story may still prove enjoyable to skim through, as long as you don't try to think about it too deeply.

Also since the protagonist is merely a Lieutenant, you should expect a substantial number of events to be of a respective magnitude.

Other than that, characters are quite likable and their interactions are fairly amusing, so if you are in a mood for a naive adventure it might be worth giving a shot.