MP: I don't know about the butt and head myself, but I will point out that we do know that the Yavanas were given permission to, and in fact encouraged to, intermarry with the native Indian population and also heavily enrolled in the Mauryan military from the reign of Chandragupta. Whatever roles of fighting the Greeks were using who had been settled in India by Alexander, those roles were likely the roles they continued to use in the following century, with perhaps a few variations over time. So on the one hand, I am tempted to doubt that any of the pezhetairoi were among those settled in India--I'd consider Greeks or even Persians to be more likely, and without Macedonians we might also be without phalangites. On the other hand, I don't know for certain that Macedonians weren't settled in India, and we do know that Alexander showed interest in incorporating more non-Macedonians into the phalanx, so perhaps there were phalangites. On my third hand, I doubt any of the settlements were large enough to be conducive to such a population-intensive formation as the Macedonian phalanx: variations on hoplitai and peltastai and mounted troops would be more likely, in my opinion.
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