It occupied the south of the Peloponnesian peninsula which had sea on the west, south and east.
28km
Sparta was not strong at sea, Sparta let it's allied sea friends handle those affairs.
No, Ithaca was on an island in the Adricatic Sea west of Sparta.
Sparta is in the center of the Greek peninsula, surrounded by the sea on three sides and the European continent to the north.
the Mediterranean
Both city-states of ancient Greece bought goods for their own needs. But Athens was a sea-going trading nation and Sparta was not, so Athens was by far the biggest buyer and seller of goods of the two.
Though landlocked, Sparta had a harbour. The city itself is in the valley of the River Eurotus which flows into the Gulf of Laconia, on the southern Ionian Sea with the Mediterranean Sea further to the south
That would be Athens
Athens.
Sparta by far. The Sparta's military forces dominated during their glory days, and no one stood in their path.
Persians
1 billion miles
A border... Sparta is in Greece. Troy is on the Asian side of the Aegean Sea, in modern Turkey. The most reasonable answer to this question is that they were separated by many miles and the Aegean Sea.