public function reduceElite(Unit $e)
{
$units = $this->getUnits();
$possRegs = $units->filter(function ($u) use($e) {
return $u->getNation() == $e->getNation() && is_null($u->getLocation()) && $u->isRegular();
});
$deadRegs = $possRegs->filter(function ($u) {
return $u->getCasualty();
});
if (!$deadRegs->isEmpty()) {
$nR = $deadRegs->first();
} else {
$nR = $possRegs->first();
}
$nR->setLocation($e->getLocation())->setCombatant($e->getCombatant())->setCasualty(false);
return $nR;
}
