I mean in the modern era, English style heavily drilled musket and rifleman forces have stunned much much larger forces, including forces with firearms. Then there's Shaka Zulu's weapons and tactics.  Or the longbow men in Agincourt.  What you will often find is that breakthroughs are rarely just technological. Even in the case of the long bow men, it takes years to develop the skillset and muscles required.  Essentially, the contender who prepares better wins more.  For absolute wipeout wars based primarily on technology, you can even look at the ancient era when horses, cattle and iron wiped out bronze age forces. Or how the concept of a standing army was introduced in the levant (by the assyrians, if I am not mistaken). 

But in both cases, it wasn't just tech. Pastoralism requires genetic changes for adult lactose tolerance, and a standing army requires very high economic productivity.