The remains of French and Russian soldiers who died during Napoleon's retreat from Moscow in 1812 were Saturday laid to rest with military honours in a rare moment of unity between the two countries.

Officials gathered with descendants of 19th-century Russian and French military leaders at a windswept ceremony in the western Russian town of Vyazma to re-bury the remains of 126 people killed in one of the bloodiest battles of Napoleon's Russian campaign.

France marks the 200th anniversary of Napoleon Bonaparte's death in 2021
France marks the 200th anniversary of Napoleon Bonaparte's death in 2021 AFP / Thomas COEX

The snow fell and a military band played in temperatures of minus 15 degrees Celsius (5 degrees Fahrenheit) as uniformed pall-bearers carried eight flag-draped caskets at a cemetery in Vyazma, a town more than 200 kilometres (120 miles) west of Moscow.

The caskets containing the remains of 120 soldiers, three women and three teenagers were later put into the snow-covered ground to the sounds of a gun salute.

Napoleon's campaigns remain a source of fascination for people from historians to re-enactors across Europe
Napoleon's campaigns remain a source of fascination for people from historians to re-enactors across Europe AFP / Michal CIZEK

The earth had frozen, and the coffins were left in the ground covered temporarily by a white canvas.

"As generations pass, death and time reconcile everyone," Yulia Khitrovo, a descendant of Russian field marshal Mikhail Kutuzov considered a national hero for repelling Napoleon, said at the ceremony.

The soldiers and the other casualties are believed to have died at the start of Napoleon's disastrous retreat from Russia
The soldiers and the other casualties are believed to have died at the start of Napoleon's disastrous retreat from Russia AFP / Dimitar DILKOFF

Prince Joachim Murat, a descendant of one of Napoleon's most celebrated marshals, saluted the fallen soldiers of Russia's army and Napoleon's Grande Armee.

The caskets containing the remains of 120 soldiers, three women and three teenagers were later put into the snow-covered ground to the sounds of a gun salute
The caskets containing the remains of 120 soldiers, three women and three teenagers were later put into the snow-covered ground to the sounds of a gun salute AFP / Dimitar DILKOFF

"Two hundred years ago, French and Russian soldiers clashed during very fierce battles in this region. The courage of the French and Russian soldiers was such that they continued to fight despite appalling weather conditions," said Murat.

He expressed hope that their deaths would serve as a reminder to the current generations of the "price of peace and brotherhood."

The ceremony marked a rare moment of unity between Russia and Europe at a time of heightened tensions over a litany of issues including the Kremlin's increasingly harsh crackdown on the opposition.

Re-enactors in period uniforms took part in the ceremonies in sub-freezing temperatures
Re-enactors in period uniforms took part in the ceremonies in sub-freezing temperatures AFP / Dimitar DILKOFF

The interment -- in which dozens of re-enactors in period uniforms took part -- took place as France marks the bicentenary of Napoleon's death this year.

The remains were discovered in a mass grave by French and Russian archaeologists in 2019.

The dig was led by Pierre Malinowski, the Kremlin-connected head of the Foundation for the Development of Russian-French Historic Initiatives.

The three women whose remains were reburied are believed to have been so-called "vivandieres", who provided first aid and kept canteens in the French army, while the three adolescents are believed to have been drummer boys.

They are thought to have fallen during the Battle of Vyazma on November 3, 1812 at the beginning of the French army's retreat from Moscow and before the horrific crossing of the Berezina River.

"Direct descendants of the main players in the conflict are meeting here together in a sign of reconciliation to commemorate the Russian and French soldiers that their ancestors commanded more than 200 years ago," Malinowski told AFP ahead of the re-burial.

The site was first discovered during construction work and was initially believed to be one of the many World War II mass graves that dot western Russia.

But research by the Russian Academy of Sciences later showed that the remains were of victims of Napoleon's campaign, said anthropologist Tatyana Shvedchikova.

Alexander Khokhlov, head of the archaeological expedition, said the discovery of metal uniform buttons helped establish that some of the victims served in the French army's 30th and 55th line infantry regiments and 24th light infantry regiment.