In addition to Alexander's Macedonians, forces were volunteered from various nations in the siege of Tyre. This is relevant because if the forces volunteered on their own, then they were acting as their own nations.
Tyre naturally saw Lycia, Sidon, Cyprus, etc. as a multitude of nations, attacking her from different angles1, as did Alexander.2 This is relevant because the prophecy was a communication to Tyre.