To clarify: there was no field communications as we now have them available. That is not to say there was no communication. What there was will have, by necessity, been basic. I’d argue that the orders, given to the officers above, were prior to battle. These men were to follow them and pass them on – as and when directed to – as the trumpets and other signals denoted.Phoebus wrote:Again, from Arrian:
"Calling a council of the Companions, the Generals, the cavalry officers, and leaders of the Grecian allies and mercenaries, he deliberated with them... Having returned, he called together the same leaders... He told them to take care to obey his orders quickly, and to transmit the orders they had received to the ranks with all rapidity..."
If Arrian is faithfully recounting Ptolemy's account here, I'd say that's a strong hint that Alexander had a means of reaching out to his tactical officers…
Furthermore, Arrian later qualifies between pre-arranged instructions (see Menidas, and the Greek mercenary cavalry for example) and on-the-spot orders.
Without reading Arrian, I’m assuming this is Gaugamela you’re referring to? If so then Menidas was posted with Alexander on the right and will not have been at any far remove. It may well have been something Alexander alerted the cavalry commander to prior to the engagement as the one thing that is clear is Alexander’s drift to the right and forward to thin the opposing front.
Agreed. As I say, communication was basic and difficult not non-existent. Eumenes’ instructions – initially via trumpet and later direct and via (one suspects) a runner on horse – are described by Hieronymus. Again, almost all will have been decided and mapped out prior to engagement. The din of battle and the sheer distance battle lines covered will have dictated this.Phoebus wrote:But that's still communication. However simple or pre-arranged the message may have been, if it really happened we're still talking about something that needed to get from the left flank to the center of the battle itself. Whether this was via heralds, a series of trumpet calls, or both... it boils down to the same thing.
Although not directly germane, you might find might find The Great War (by Les Carlyon)a great read. I am half way through and it is as well written a tome as I’ve read in years. What constantly comes through is the utter difficulty with communication and only across fronts of a few thousand yards. Obviously Alexander had no artillery to deal with but the point remains: with the dust, the noise and the distances it will have been similar.