"The Peloponnesian War" is a classic account of the Peloponnesian War written by the Greek historian Thucydides around 400 B.C. This is one of the three greatest accounts ever written about war, the other two being Sun-tzu's "The Art of War" (written around 500 B.C.) and Carl von Clausewitz's "On War" (published in A.D. 1832).