The conqueror may tell his enemy: “A chief with a powerful army means to offend us, so let us combine and put him down; you may take possession of his treasury or territory.” When the enemy agrees to the proposal and comes out honoured by the conqueror, he may be slain in a tumult or in an open battle with the chief (in concert with the conqueror).
—Kautilya, in the Arthaśāstra, 13.3