Looking for His glorious appearing! Titus 2:13

The US military has ordered its troops in Europe to avoid wearing their uniforms when off base.

Personnel have also been advised to ensure their privacy and geolocation settings on social media are not "overly revealing". 

European Command did not say what had prompted the directive, which affects some 70,000 US service members. 

US soldiers on exercise in Bavaria, Germany Pic: Flickr (Pentagon)

Spokesman Navy Capt Greg Hicks said: "We continually assess threats to our forces with and alongside our host nation counterparts, and take appropriate measures based on those assessments. 

"We will not get into the specifics of those threats nor the assessments."

Video: Turkey Protesters Attack US Sailors

The order, issued on 10 November, comes a week after an attack on three US sailors, who were not in uniform, in Istanbul, Turkey.

Anti-American protesters threw red paint and briefly managed to force white sacks over the trio's heads after identifying them as US servicemen.

Last month a soldier in Ottawa, Canada, was shot dead in what authorities called a terrorist attack. The gunman was shot dead by a parliamentary security official.

Two days earlier, a Canadian soldier died and another was injured after they were run over in a Quebec car park.

Their attacker, said to have been inspired by the Islamic State extremist group, was shot dead by police.

Last year, British soldier Lee Rigby was killed in one of the most notorious attacks on a serviceman.

Two Islamic extremists in a car ran over the British soldier in broad daylight in Woolwich, London then stabbed him to death.