For 250 years, US troops could tow their cannons around the battlefield. The war in Ukraine shows they won't have that luxury in the future.

Tech Insider
Army soldiers M777 howitzer artillery
US soldiers move an M777 towed 155 mm howitzer at a training area in Germany in March 2013.

US Army/Gertrud Zach

Ukraine has 14 kinds of howitzers to batter Russian forces, but each gun brings a new problem for Kyiv

Tech Insider
Ukraine artillery M777 howitzer
Ukrainian troops fire a M777 howitzer near Zaporizhzhya on July 16.

Gian Marco Benedetto/Anadolu Agency via Getty Images

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