How a band of javelin throwers shattered the myth of Spartan invincibility
In 391 BC, the elite Spartan hoplite regiment was considered the gold standard of Greek warfare. Yet, at the Battle of Lechaeum, a nimble force of Athenian peltasts proved that heavy infantry could be dismantled by speed and harassment, permanently altering the trajectory of ancient military strategy.
The conflict emerged from the Corinthian War, a period marked by shifting alliances and internal strife. In 392 BC, a civil war in Corinth saw pro-Spartan oligarchs exiled by democrats. These exiles secured Lechaeum, the city's vital port, with Spartan assistance. By 391 BC, King Agesilaus had captured several strongpoints in the region, effectively bottling up the Athenian-backed democrats within Corinth.
The turning point arrived when a Spartan commander led a mora—a regiment of 600 men—to escort Amyclaean allies past Corinth. Believing the democrats were too cowed to fight, the commander marched without missile support. Athenian generals Iphicrates and Callias spotted the vulnerability. Iphicrates deployed his peltasts, who utilized hit-and-run tactics to pelt the heavy infantry with javelins. Whenever the Spartans charged, the peltasts retreated, only to resume their assault the moment the Spartans turned back to their formation.
The Spartan commander’s tactical errors, including a failure to use his cavalry to drive off the attackers, proved fatal. As the peltasts wore them down, the regiment was forced toward a hilltop near Lechaeum. When Athenian hoplites arrived to reinforce the attack, the Spartans panicked and fled toward the sea. Of the 600 men, 250 were killed. The defeat shocked King Agesilaus, who soon departed the region, allowing Iphicrates to recapture several forts and neutralize Spartan operations around Corinth.
This battle remains a landmark in military history as one of the first instances where light, mobile troops defeated heavy hoplite infantry. It exposed the rigidity of traditional Spartan formations and demonstrated the effectiveness of specialized units. While the Spartans maintained control of Lechaeum, their regional dominance was broken, and the engagement serves as a definitive example of how tactical innovation can overcome established military superiority.
Source: Battle of Lechaeum
