When Zachariah Fike returned from Iraq in 2006, he needed a hobby to stop his mind wandering back to the scenes he had left behind. He had come back a different person - he'd seen goodthings and bad things, and needed a way of dealing with the stress.

For him, the solution was to collect antiques - he enjoyed the thrill of searching for lost treasure. Sometimes he came across military items - helmets, uniforms, medals. It bothered him to seethem lying around, so he started buying them up.

Fike, aged 35, comes from a long line of soldiers. His parents met in the army. His grandfather was a World War Two veteran who would drive hitchhiking soldiers all the way home, even if it meantgoing 100 miles out of his way.

So it was no surprise that Fike was drawn to military memorabilia. But his feelings about this trade changed in 2009, when his mother, Joyce, presented him with a very special Christmas gift - aPurple Heart.

America's oldest military award, the Purple Heart started out as a cloth patch in the shape of a heart, pinned to the chest of Revolutionary War soldiers by General George Washington himself.Later it became a heart-shaped medal, decorated with the bust of Washington, and given to those wounded or killed in battle.

"It's one of those awards that most soldiers don't want because it means that you've been struck by enemy fire or you've lost your life," says Fike. "So it'svery special."

The one Joyce had bought for $100 in an antique shop near her home in upstate New York was engraved "For Military Merit, Corrado A.G. Piccoli". It came in a little case with the dog tagsall soldiers carry so they can be identified if they die in battle.

"When I saw it, I knew it didn't belong to me," says Fike. "It symbolises an individual who's shed their blood or their life for a cause, for their country. Thatshouldn't be in somebody's personal collection. It should be with that family or in a place of honour."

He started digging around in archives to find out what he could about the man who had earned the medal, and learned that Private Corrado Piccoli had enlisted in January 1943, shortly aftergraduating from high school, and had died in France on 7 October 1944. Fike also found Piccoli's home address and discovered he had six brothers and sisters.

In January 2011 he picked up the trail again, driving up to Watertown, near his mother's home, to visit Piccoli's old high school.

There, in the 1942 yearbook, he spotted the picture of an earnest young man wearing glasses and a tie. "Immediately he became a person, he became real," says Fike. Later that day he meta nun who told him that one of the Piccoli sisters, Mary, still lived in town.

The story of Corrado Piccoli and his Purple Heart was broadcast on the news, and the next morning Fike started receiving phone calls from all over the country. Medals had been found in abandonedhomes, vehicles, furniture - one had even been dug up in a backyard by a dog.

It was going to be a lot of work, so Fike decided to set up a non-profit organisation, Purple Hearts Reunited, to return lost or stolen medals to veterans or their families.

At first Fike did all of the research himself. After a full day's work, training young officers for the Vermont Army National Guard, he would come home, help his wife put the childrento bed, and sit up for hours working on his laptop.

This year Fike was named Soldier of the Year by the Military Times, but not everyone regards him as a hero - to medal collectors he is a menace. Purple Hearts are valuable collector's items,and Fike has been campaigning to stop them from being bought and sold.

"Believe it or not, there's millions of collectors across the country and even overseas that actively pursue these medals and they collect them, trade them, like baseball cards,"says Fike. He feels this is wrong - just as he did when he held Corrado Piccoli's Purple Heart in his hand the first time.

"Early on I was very verbal about how I thought it was deplorable to make a profit off anyone that sacrificed their life," says Fike. "It's a national symbol that symbolisessomeone that shed their blood or gave their life and we should respect that. Who would argue that laying down your life is not the greatest act?"

He has even helped bring about a bill - The Private Corrado Piccoli Purple Heart Preservation Act. It does not ban anyone from owning such medals, just from profiting from their sale.

The idea has dismayed many collectors, who fear the ban could drive the trade underground or abroad and erode public knowledge of military history.

But Fike doesn't buy it. "Some of them will say, 'We want to preserve history, we're not here to make a profit.' But if you buy a medal for $50 and then find out the manfought at Iwo Jima and you turn around and sell it for $750, you're making a profit," he argues.

Even when he knows the soldier's family sold the medal, Purple Hearts Reunited still "rescues" it, he says, "because we still don't believe that the medal should be insomebody's private collection".

Sometimes he sees a medal in a collection online, finds the family it belongs to, then asks the collector to sell it to him for whatever they paid for it, so that he can return it.

But many collectors won't deal with Fike directly, and he now has to rely on intermediaries. His "rescue team" are continually buying medals from online auction sites - last yearalone they spent $50,000 (£40,000) on 125 medals. The average posthumous Purple Heart medal on the open market goes for about $300 (£240), but if it has some historical significance it could go forthousands.

To read the complete article, see:
The medal detective (www.bbc.co.uk/news/resources/idt-5c1940d8-5f8f-4fd4-ac12-e216184a9a72)

To read the earlier E-Sylum articles, see:
U.S. HOUSE BILL WOULD BAN PURPLE HEART SALES (www.coinbooks.org/esylum_v19n48a26.html)
DICK JOHNSON ON THE PURPLE HEART LEGISLATION (www.coinbooks.org/esylum_v19n49a19.html)