Throughout history, cats have been used in the military. Military units have often adopted cats as mascots, but navies around the world have relied on cats to clear out rodents on ships and harbors.
During World War Two, a cat named Bomber could distinguish between the sounds of German and British aircraft. When Bomber headed for a bomb shelter, the family knew to follow because Bomber could tell when bombs would start falling nearby.
Since cats don’t start wars, that shows that cats are smarter than most humans on the planet. Then again, viral cat videos on the Internet have already proven that.