I know horns and flags were used but, I'm still at a loss for actual examples of battle orders issued and executed while in contact with the enemy, by the Roman Legions. I find that the fog of war and communicating while under direst is difficult in today's conflicts and can only assume how much more difficult communicating orders during battle must have been for the Roman Armies of the 1st century, CE,
I have a question branching off this topic. In HBO's Rome, Lucius Vorenus is shown giving commands with a whistle, was this accurate and if so how widespread were whistles in the Roman army?
I believe there are some examples given in Julius Caesar's The Battle for Gaul. I specifically remember reading about messages carried by runner, and requests for parlay being done in the same way. It's been years since I read it, but it wasn't terribly long and you could probably skim through to the campaign and battle descriptions fairly easily.
hi! you may find some additional information in the FAQ