/**
* Give up the war
*
* @param Army $enemy The army to surrender to
*
* Note: Regardless of the $enemy, a surrender applies to all wars we are engaged in.
*/
private function demandSurrender($enemy)
{
if ($this->troops > $enemy->troops * $enemy->troops) {
$enemy->parley();
$enemy->surrendered = true;
}
}
