'We are at war': Polish troops battle Russia's migrant weapon on NATO's front line Fox News Digital rides with Poland's 18th "Iron Division" along the Belarus border, where soldiers face Molotov cocktails, knife attacks and freezing 12-hour patrols to stop illegal migrants officials say Russia and Belarus are pushing toward NATO NEW You can now listen to Fox News articles! This is part two of a series examining the challenges confronting the NATO alliance . POLAND-BELARUS BORDER — Riding in a