For 45 days straight, Russian troops on the front line in eastern Ukraine were pinned back by machine gun fire.

Add Yahoo as a preferred source to see more of our stories on Google. Ukraine's soldiers have been fighting Russia with M2 Browning machine guns, an iconic American weapon. Now, ground robot makers ...

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Follow Matthew Loh Every time Matthew publishes a story, you’ll get an alert straight to your inbox!