‘[Alexander] pressed on to the Cilician Gates. When he reached the site where Cyrus had camped in his expedition with Xenophon, and saw that the Gates were strongly guarded, he left Parmenion there with the heavier-armed infantry brigades while he himself, at around the first watch, took the foot guards, the archers, and the Agrianians and advanced towards the Gates under cover of night, intending to fall on the guards when they were not expecting an attack.’ (Arrian II.4.3)
‘On the next day, [Alexander] took the rest of the infantry, the archers, the Agrianians, the Thracian cavalry, the royal squadron of the Companions, and three further squadrons, and set out for Miletus. What they call the outer city had been abandoned by its garrison, and Alexander took it on the first assault…’ (Arrian I.18.3)
When Alexander laid siege to Miletus, a Persian fleet approached the city’s port hoping to bring help to the city. They were unable to do so, however, as the Macedonian navy – led by Nicanor – was blockading it. The Persian fleet was forced to anchor ‘under Mount Mycale’ (Arr. I.18.5) and eventually, withdraw.
Credit Where It’s Due Amphitheatre at Miletus: Wikipedia