Two decades of counterinsurgency wars have taken a toll on the US Army's proficiency in tank gunnery and mechanized warfare.

Prince William, decked out in a camouflage military uniform, travelled in the tank as it sped across muddy terrain in Estonia, less than 100 miles from Russia. | ITV National News ...

As the UK and its European allies ramp up their defence spending, Prince William has spent two days with British troops based ...