Instituta Laconia
Plutarch
Plutarch. Moralia, Vol. III. Babbitt, Frank Cole, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1931 (printing).
Whenever they overcome their enemies by
outgeneralling them, they sacrifice a bull to Ares, but when the victory is gained in open conflict, they offer a cock, thus trying to make their leaders habitually not merely fighters but tacticians as well.