That's not by accident. For years the US Defense Department has been handing its surplus equipment over for free to police departments -- and the departments, large and small, have revelled in it.

Critics say it has been part of the overall militarization of the police, and helped fuel mass nationwide demonstrations against police abuse and deadly tactics that began after the May 25 killing of a handcuffed African American, George Floyd, by a Minneapolis police officer.

- Small-town police armed for war -

As soon as protests began in Minneapolis, the city's troubled police department rolled out armored vehicles appearing more suited to Middle East battlefields.

Other large cities have them too, but also small towns.

In 2013 police in Flathead County, Montana, which has 90,000 residents nestled near the scenic Glacier National Park, received a landmine-resistant armored vehicle, one year after taking delivery of a military transport.

The 10-person (two only part-time) police department in Ada, Oklahoma, population 16,000, got their mine-resistant armored car in July 2019, after stockpiling 34 M-16 assault rifles over the years.

In a country where many people have their own guns and where schools have suffered mass shootings, even local education districts are taking advantage of the Pentagon's handouts.

The 47 primary and secondary schools of the Bay District in Panama City, Florida acquired no less than 27 assault rifles and two mine-resistant armored vehicles in 2012 and 2013.

- Trump restarted giveaway -

The "1033" Pentagon surplus program has existed for years.

Since 1997, the US military has distributed used and new equipment ranging from handguns to helicopters to armored vehicles, worth around $8.6 billion, to more than 8,000 federal, tribal and local police forces, according to the US Congress.

In 2015 President Barack Obama severely limited the program, but his successor Donald Trump restored it in 2017.

That year alone, some 500 million pieces of military equipment were transferred to the country's police services under the 1033 program.

But the recent anti-police protests have recharged efforts to stop it.

This week around 200 lawmakers in Congress, mostly Democrats, sponsored a bill, the "Stop Militarizing Law Enforcement Act", to again reel in the program.

The bill, in the House of Representatives, would strictly limit the transfer of guns, ammunition, grenades, explosives, certain kinds of vehicles, and drones and other aircraft designed for the battlefield.

A parallel bill is being prepared in the Senate, pushed by Democrat Brian Schatz, who has fought against over-arming the police for years.

"It is clear that many police departments are being outfitted as if they are going to war, and it is not working in terms of maintaining the peace," Schatz told The New York Times.

"Just because the Department of Defense has excess weaponry doesn't mean it will be put to good use."

Schatz and Republican Senator Rand Paul attempted to push through a similar law in 2014, after the first publication of details of the 1033 program, amid the riots over police brutality against African-Americans in Ferguson, Missouri.

The protests and riots that broke out over the police shooting of 18-year-old Michael Brown were met by police officers carrying assault rifles and driving armored cars they got from the Pentagon.