There are some important inventions that seem so simple in concept that one has to wonder why they weren't invented centuries before they came about in OTL. The stirrup is one of these. There is evidence that horses had been domesticated since possibly 4500 BC or thereabouts, and we know they were pulling chariots as early as 2,000 BC. Cavalry came into use among the steppe nomads before 1,000 BC, and Assyria was using mounted lancers and archers as early as 865 BC. Yet the first precursors of the stirrup only appear in India in the 4th century BC, and fully developed paired stirrups first seem to appear in China about 300 AD.
The stirrup is a relatively simple piece of technology, and it seems clear, at least IMHO, that the idea could have occurred to someone much, much earlier. So what if it had? Let's say that some Assyrian cavalryman in the army of Sennacherib gets the idea during the siege of Jerusalem in 701 BC. He makes a set and demonstrates them to the King, who is impressed and orders his cavalry equipped with them. The Assyrians use them in their campaigns in the succeeding years, and then gradually the technology spreads to other peoples as well...the Babylonians, Persians, Egyptians, Scythians, etc.
How does this affect history and especially warfare? Will the Greeks at Marathon be able to stand before the fearsome charge of the Persian Cataphracts, for example?
The stirrup is a relatively simple piece of technology, and it seems clear, at least IMHO, that the idea could have occurred to someone much, much earlier. So what if it had? Let's say that some Assyrian cavalryman in the army of Sennacherib gets the idea during the siege of Jerusalem in 701 BC. He makes a set and demonstrates them to the King, who is impressed and orders his cavalry equipped with them. The Assyrians use them in their campaigns in the succeeding years, and then gradually the technology spreads to other peoples as well...the Babylonians, Persians, Egyptians, Scythians, etc.
How does this affect history and especially warfare? Will the Greeks at Marathon be able to stand before the fearsome charge of the Persian Cataphracts, for example?