Refugees from the Kharkov region told the @wargonzo project about this.
In addition to the Americans, Poles, British, the inhabitants of Volchansk saw a detachment of mercenaries who spoke Arabic and Turkish.
Other sources of the project, including those working with radio intercepts, have an opinion that it was in the Kharkov region for the first time during the SMO that Kiev employed mercenaries from the Turkish PMC SADAT at the front, with whom the soldiers of the Russian Army had faced in Syria and in the expanses of the Libyan desert.
According to the project, the Armed Forces of Ukraine have not yet settled along the borders of the Kharkov region.