There's nothing the Conqueror Army can't do; if they don't have it, they can continuously transport it from the Giant Dragon Coast via Conqueror Caravan, following the Wild Border River.
Although the cities along the Giant Dragon Coast have formed the Eight City Alliance, everything is still in its initial stage, with much progress being swiftly made. Their Allied Army is still stationed in Posku, but they don't dare to openly oppose the flourishing Conqueror Army. They only ensure that the latter dares not launch a large-scale attack on Posku and do not hinder the usual trade—doing so would only provide the Conqueror Army with an excuse to start a war.