Intense video footage released by a American volunteer fighter in the Ukrainian Foreign Legion shows his team in heavy urban combat with Russian Spetsnaz in the city of Severodonetsk.The video that was uploaded to the twitter account of the fighter with a US marine background shows the men fight their way through a urban areal while heavy fighting is ongoing.According to the twitter account the men inflicted significant damage on Russian and Chechen spetsnaz but alos had losses on their side too.The video appears to be part of a battle from which a short 40 second clip was uploaded a few days ago that was also showing foreign legion fighters in the same location.We could not find the orginal source of the last part of the video but the first one was released on https://twitter.com/Marine_Ukraine