Altogether they were fourteen thousand strong.

The march was prompted by the notion that the Lacedaemonians were at a loss how to effect their passage, and also by suspicions of an attempt to overthrow the democracy.

Some cavalry also joined the Athenians from their Thessalian allies; but these went over to the Lacedaemonians during the battle.
The battle was fought at Tanagra in Boeotia.

After heavy loss on both sides, victory declared for the Lacedaemonians and their allies.
After entering the Megarid and cutting down the fruit trees, the Lacedaemonians returned home across Geraneia and the isthmus.

Sixty-two days after the battle the Athenians marched into Boeotia under the command of Myronides, defeated the Boeotians in battle at Oenophyta, and became masters of Boeotia and Phocis.