Final answer:
The major Phoenician cities of Tyre and Sidon were located in present-day Lebanon, while Carthage was situated on the coast of present-day Tunisia in North Africa.
Step-by-step explanation:
The three major Phoenician cities were Tyre, Sidon, and Carthage. Tyre and Sidon were located on the coast of present-day Lebanon, serving as significant ports and hubs for trade and commerce. Carthage, on the other hand, was founded around 814 BCE and was located on the coast of present-day Tunisia in North Africa. As a dominant center of trade in the western Mediterranean, Carthage later became known for its conflict with the Roman Republic.