Frequency, Vibration & Energy: The most logical way for non-physical communication.
Everything is energy, that goes without saying and a closer look down a microscope would show you that everything vibrates, even that desk you think is solid. A slow level of vibration that gives the illusionary sense of solidity.
Towards one o’clock, the Jacobite artillery opened fire on government soldiers. The government responded with their own cannon, and the Battle of Culloden began.
Bombarded by cannon-shot and mortar bombs, the Jacobite clans held back, waiting for the order to attack. At last they moved forwards, through hail, smoke, murderous gunfire and grapeshot. Around eighty paces from their enemy they started to fire their muskets and charged. Some fought ferociously. Others never reached their goal. The government troops had finally worked out bayonet tactics to challenge the dreaded Highland charge and broadsword. The Jacobites lost momentum, wavered, then fled.