With which units can he be played?
Miltiades is designed to be played with spears. He can also be played with pikes because of Fear and Break Ranks which allows him to catch up with his enemies. He can also be played with slingers, because of his speed, and the lack of other commanders designed for this type of units. Finally, he can be played with Greek cavalry, although he is not designed for that and he can only use Fear with them.
What is his playstyle?/How to play with him?
Miltiades relies on speed and flanking to win most of his engagements. Going for the flanks of an engaged unit and using Fear on him is the most efficient way to use Miltiades. Therefore the playstyle of Miltiades is mostly an aggressive one.
Miltiades can also be used to hunt down skirmishers thanks to his speed and short cooldown charge.
Like every other Greek commander, Miltiades can use the Hoplite Phalanx and therefore be defensive.
Break Ranks is a powerful ability, but it makes you vulnerable against charges. Disable it when you are about to get charged, or/and activate Hoplite Phalanx to stop the incoming charge.
Fear can be used to break a unit's morale, but also to slow a unit down. Think about using it on a unit you are chasing to slow it down!
Athenian general Miltiades, born c. 555 BC, was the general who defeated the Persian army at the Battle of Marathon in 490 BC by luring them into a trap. The Persian plan was to delay the Athenian army at Marathon while cavalry travelled by sea to attack Athens herself.
The Persian force stood over 20.000 men strong while the Greeks only had 10.000 men and lacked the archers and cavalry the Persians had. The commanders of the Greek army was slipt five to five on attacking and waiting for reinforcements, the traditional charge would end in a defeat; yet waiting would mean the Persian army would grow. The Persians got word from their spies and moved their cavalry, and began to head towards Athens. Miltiades appealed to the supreme war counsellor, Callimachus, to let him attack the cavalry the Persians had left behind and was allowed to do so.
Miltiades had the Greeks spread out in a thin line across the Persians and then run towards them, attacking head-on. The Persians who saw the weak Greek centre racing madly towards them thought the Greeks had lost it but then the lines clashed the Persians suffered severed damage but were able to turn the fight around and made the Greek centre collapse. The Persians now confident of their victory played into Miltiades' trap, he ordered the wings of the army to close in on the centre, crushing the Persians between them. The panic Persians began to run to their ships but most were killed and their ships captured.
The Greeks now quick-marched to Athens to intercept the cavalry's fleet but the Persians retreated and sailed for Persia. The Athenians had lost 192 men at Marathon where the Persians had lost 6.400 men, saving Greece from Persian domination.
In 489 BC, Miltiades was once again sent to lead an army, this time to retake the disloyal islands of the Cyclades but he was defeated and wounded in the leg. As he returned to Athens with his failings for securing a victory he was charged with treason. He died from gangrene while in prison: an ignominious end for the hero of Marathon.