This is assuming random Steppe dudes even know mountain passes exist. Discovering passes is a very hard task. US had to hire Native Americans to show them the passes in rocky mountains. You don't just bump into a pass by chance when riding through mountains.
For those who are doing all manner of cope to claim Steppe ingres in 1200 BCE is plausible:
Take the challenge. Go to Uzbekistan, build a chariot from the non-existent trees, capture a couple of horses, yoke them and navigate across Hindu Kush without GPS or using modern roads.
Take the challenge. Go to Uzbekistan, build a chariot from the non-existent trees, capture a couple of horses, yoke them and navigate across Hindu Kush without GPS or using modern roads.
May be good idea to get life insurance first, at least so your family benefits from the cost of your unshakeable belief in absurd ideas.
To the geniuses who claim that they must have abandoned their valuable chariots and trekked 425km on foot thru treacherous mountains: it would take ~20 days at 8hrs/day, need supplies for another month for altitude adaption. Reality: most would die.
To the geniuses who are talking about Alexander, Mughals, Persians et al. They all came from Kabul via Khyber pass, which is south of Hindu Kush...and 1500-3000 yrs later.
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