Everyone is primative compared to us. But for their time, they were quite advanced. They obviously had no need for metal, seeing as how they had built massive stone structures without it. They were quite advanced in their mathmatics, even having invented the Zero by 36BC. Hell, they even had a system of writing.
However, from a military standpoint, you are correct. They stood absoulutly no chance.
However, from a military standpoint, you are correct. They stood absoulutly no chance.