A private security contractor in Afghanistan (Matt Moyer/Getty Images)

Last week, Russia claimed to have seized control of the city of Bakhmut after an eight-month battle with Ukrainian forces — the longest and bloodiest fight of the war so far. The assault, however, wasn’t led by the Russian Armed Forces, but by a private army that has been fighting alongside regular Russian troops since the invasion: the infamous Wagner Group.
The Wagner Group has always been cloaked in mystery. In the first days of the war, reports emphasised the secretive nature of its military operations, including a plot to assassinate Zelenskyy and his cabinet. Until recently, it was unclear whether a company registered under the name “Wagner” even existed.
That all changed in September 2022, when Yevgeny Prigozhin, a close ally of Putin, published a statement claiming that he founded the group in 2014 to “protect the Russians” when “the genocide of the Russian population of Donbas began”. Then, in January this year, he decided to make it official, registering Wagner as a business and opening its “PMC Wagner Center” headquarters in St Petersburg. He didn’t make any secret of its activities: as the company’s name, which also appears on the group’s logo, makes clear, the Wagner Group is a PMC: a private military company, also known as a mercenary group. The Russian government was forced to acknowledge its existence. The Wagner Group’s clandestine status was officially discarded.
In many ways, Wagner’s emergence from the shadows symbolises the changing nature of modern warfare, in which the traditional Clausewitzian paradigm — based on a clear distinction between public and private, friend and enemy, civil and military, combatant and non-combatant — has given way to a much messier reality, in which state armies now regularly fight alongside private and/or corporate paramilitary and mercenary groups. Today’s conflicts, even when violent in nature, often occur in a “grey zone” below the threshold of conventional military action; adversarial states increasingly confront each other through proxies or surrogates — including private armies — rather than through their own armed forces. And this is not just a Russian issue: the increasingly central role of private military and security companies (PMSCs) in modern warfare is a global phenomenon.
Private armies have existed for centuries. In recent decades, the use of mercenaries was particularly widespread during the Cold War, especially in Africa, in the context of decolonisation and the ensuing civil wars. In particular, they were widely used between the Sixties and early Eighties by the West to prevent colonies attaining independence or to destabilise or overthrow newly independent governments, such as in the Democratic Republic of Congo, the Republic of Benin and the Republic of Seychelles.
At the time, there was virtually no international legal framework regarding mercenarism. It was only in 1977 that the Geneva Conventions incorporated an international legal definition of it. A mercenary, it held, is any person who is recruited to fight in an armed conflict, who actively takes a direct part in the hostilities, and who is neither a national of a party to the conflict nor a resident of territory controlled by one. It was a very narrow definition — but one which, at the behest of the newly independent nations, was specifically tailored to address the use of mercenaries by the West against the post-colonial governments.
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