This is what happens when the rules of engagement are loosened

We’ve all heard the saying: “All is fair in love and war.” While it may hold true for love, the war part couldn’t be further from the truth for our troops.

According to the “Sanremo Handbook on Rules of Engagement” posted by the International Institute of Humanitarian Law, the rules do not dictate how the troops achieve results. But they do say what’s unacceptable.

Related: 8 of the most terrifying Vietnam War booby traps

Simply put, the rules of engagement establish bounds. And like in sports, stepping out of bounds can result in penalties — war crimes convictions.

These rules can make your job more challenging. As Mike Downs — a Marine during the Vietnam War — found out the hard way.

When he reported to Hue City, Vietnam, to assist a brother division, he realized the law of war was making U.S. efforts and firepower useless.

“We were not to use any indirect fire weapons, interpreted by us to be artillery,” Downs said in the video below.

But that all changed when the new commander relaxed the rules.

“If you even suspect there’s enemy in the building, blow the building down,” he said. “This was war as we understood.”

This American Heroes Channel video shows how the enemy’s fighting chance dissipated when the rules of engagement were loosened:

American Heroes Channel, YouTube

TOP ARTICLES
This is the latest version of the M9 service pistol

The M9A3 offers a bigger magazine, a user-friendly grip, and a host of improvements based on lessons learned from over three decades of service.

This is what the DoD has planned for a zombie apocalypse

It does touch on many of the pop culture elements of zombie lore, but it breaks things down to become applicable to most situations that would similar to an actual outbreak.

Some dirtbags messed with an Iwo Jima memorial — and Marines caught 'em on film

Officials say an Iwo Jima memorial in Fall River was doused with the contents of a fire extinguisher last weekend. Police are investigating

Vets are going to get a new ID card, and they'll be ready for use next month

The new identification card will provide employers looking to hire veterans with an easier way to verify an employee's military service.

This is the story behind the rise and fall of the Islamic State group

The Islamic State group, responsible for some of the worst atrocities perpetrated against civilians in recent history, appears on the verge of collapse.

Now the Iraqi army is going after the Kurdish forces who helped beat ISIS

Iraqi federal and Kurdish forces exchanged fire on Oct. 20, capping a dramatic week that saw the Kurds hand over territory across Northern Iraq.

This Kurdish female militia refuses to stop its hunt for ISIS terrorists

A Kurdish female militia, after helping free the city of Raqqa, said it will continue the fight to liberate women from the extremists’ brutal rule.

The US just sent nearly 1M bombs and missiles to Guam — here's why

Hint: There's this guy a few thousand miles away who's threatening to lob a nuke in their direction.

This is what the 400 US troops in Somalia are actually up to

The US has quadrupled its military presence in Somalia after Al-Shabab killed nearly 300 civilians in two truck bombings. Half of them are special ops troops.

The war between the US Army and Magpul is heating up over ice

Magpul officials are calling foul on the Army's claim that its rifle magazines don't work in the cold — and they say they can prove it.