This is my favourite show of all time. It is definitely recommend to 13+. There is lots of death and gore, but you also get emotionally attached to characters and it leaves seasons on cliffhangers. The characters form special bonds that are unbreakable. The 100 is such a great show, and if you want to be sitting on the edge of your seat, waiting for the next thing to happen this is definitely the right choice.
Before I watched this show I couldn’t handle any blood, guns or wars. But then someone introduced it to me and by the end of the first season it was my favourite show.