I was working on a science fiction story with a variety of alien species. Most of them seemed entertaining and plausible enough, but I got stuck on one particular species that I could use some help on.
So, I came up with an idea that a classical warrior culture could be sustained into past the modern age by limiting how useful a species would find long ranged weaponry. The thinking was: without the ability to kill at a distance with relative ease, power and prestige would remain with those who had the time to learn melee combat and martial arts. Essentially, it would keep aristocratic systems of warriors (knights, musketeers, samurai, ect.) around centuries longer than what happened with Earth's history.
I tried this with a species I called the Ohgunate, and they have limited use with projectiles due to having terrible depth perception. They have an incredible field of vision, but a very narrow field of actual binocular vision. For example, humans have a total field of vision of 210 degrees (horizontally), and 140 degrees of binocular field of vision. Ohguns' ratio might be more like 320/80. They can still aim a projectile with accuracy, but the process takes significantly longer. Plenty of time for another Ohgun to run up and stab the chum, savy?
If the root concept about depth perception and warrior culture makes sense (and feel free to tell me if it doesn't), what head shape/eye type would allow for this ratio of field of vision? I thought about a system with three or more eyes, but couldn't work out if that was plausible. Just in case its relevant, the Ohgunate are humanoid bipeds and have a omnivorous diet that leans more to vegetation compared to humans.
Note: humans do have a huge military advantage over this species. Post-first contact boasting turned out embarrassingly for the Ohgunate.
**edit- I've got some good answers and will probably choose in a few hours, but, wow, this question got downvoted a lot. If anyone has any idea why, would you mind leaving a comment? I would like to learn from any mistakes I made.