History of the Peloponnesian War

So Agis, in fear that his left might be encircled, and thinking that the Mantineans were extending too far beyond it, gave orders to the Sciritae and the soldiers of Brasidas to move out, away from his main body, and make the line equal to that of the Mantineans; then he directed two polemarchs, Hipponoïdas and Aristocles, to cross over with two companies from the right wing, throw themselves in and fill up the gap thus created, thinking that his own right wing would still have more than enough men, and that the line opposed to the Mantineans would be strengthened.