For over 150 years , Sparta became the dominant land power of Greece , with the Spartiate hoplites serving as the core of its army .
Around 544 BC , Sparta defeated Argos , establishing itself as the preeminent power in the Peloponnese .
For over 150 years , Sparta became the dominant land power of Greece , with the Spartiate hoplites serving as the core of Sparta 's army .
Around 544 BC , Sparta defeated Argos , establishing itself as the preeminent power in the Peloponnese .