Rose-tinted view of Alexander. A brilliant general yes, but he was also a megalomaniac who sold out his own. His betrayal of Philotas and Parmenio and the pages conspiracy were terrible episodes in his storied life.
Not at all rose-tinted: we were discussing his tactics, not his politics, megalomania or paranoia - all of which, if you read
all the literature, are seriously debatable and have been seriously debated elsewhere.
I tried to make clear that his 'tactical innovations' were or may have been as much his father Phillip's as his - another debate still on-going in academia and elsewhere.
As to Combined Arms Tactics in Civ VI, I think it could be modeled within the 1UPT system, but it would require a set of Adjacency Bonuses or Consecutive Attack Bonuses, possibly related to some sort of Military Policy Cards in the Civics area.
Something like: a Anti-Cavalry unit attacked by a Melee Unit and then a Cavalry/Mounted Unit loses its Anti-Cavalry Bonus, because its formation is disrupted fighting the melee unit (shades of Alexander's Hetairoi-Hypaspist combinations)
Possible 'multiplicative' combinations include:
Cavalry with Spearmen - as Alexander's light cavalry at Gaugamela
Cavalry with Ranged or Recon troops - as in the German Cavalry versus the Gauls and Romans, who had light infantry mixed with their horsemen
Field Cannon with Cavalry in the Renaissance and later - because forming square to defend against the cavalry makes you a massive target for the guns.
Some combinations, like Archers firing first before Melee or other units 'charge in', is just Good Sense and doesn't need other modifiers, but the sequence of Musketmen or similar attacked by cavalry, which tactically requires them to 'bunch' to defend themselves against being over-run and thus greatly multiplies the effect of Cannon/Artillery fire, does deserve a 'tactical bouns'
