NAIROBI, Kenya — Erik Prince, the previous head of the safety contractor Blackwater Worldwide and a outstanding supporter of former President Donald J. Trump, violated a United Nations arms embargo on Libya by sending weapons to a militia commander who was trying to overthrow the internationally backed authorities, based on U.N. investigators.A confidential U.N. report obtained by The New York Times and delivered by investigators to the Security Council on Thursday reveals how Mr. Prince deployed a pressure of international mercenaries, armed with assault plane, gunboats and cyberwarfare capabilities, to japanese Libya on the top of a serious battle in 2019.As a part of the operation, which the report mentioned price $80 million, the mercenaries additionally deliberate to type successful squad that might monitor down and kill chosen Libyan commanders.Mr. Prince, a former Navy SEAL and the brother of Betsy DeVos, Mr. Trump’s training secretary, turned an emblem of the excesses of privatized American navy pressure when his Blackwater contractors killed 17 Iraqi civilians in 2007.In the previous decade he has relaunched himself as an govt who strikes offers — generally for minerals, different occasions involving navy pressure — in war-addled however resource-rich nations, principally in Africa.During the Trump administration, Mr. Prince was a beneficiant donor and a staunch ally of the president, typically in league with figures like Steve Bannon and Roger Stone as they sought to undermine Mr. Trump’s critics. And Mr. Prince got here below scrutiny from the Trump-Russia inquiry over his assembly with a Russian banker in 2017.Mr. Prince refused to cooperate with the U.N. inquiry; his lawyer didn’t reply to questions concerning the report. Last yr the lawyer, Matthew L. Schwartz, informed the Times that Mr. Prince “had nothing in any respect” to do with navy operations in Libya.The report raises the query of whether or not Mr. Prince performed on his ties to the Trump administration to drag off the Libya operation.It describes how a buddy and former companion of Mr. Prince traveled to Jordan to purchase surplus, American-made Cobra helicopters from the Jordanian navy — a sale that ordinarily would require American authorities permission, based on navy consultants. The buddy, assured officers in Jordan that he had “clearances from in every single place” and his workforce’s work had been accredited “on the highest stage,” the report discovered.But the Jordanians, unimpressed by these claims, stopped the sale, forcing the mercenaries to supply new plane from South Africa.A Western official, talking to the Times on the situation of anonymity as a result of he was not permitted to debate confidential work, mentioned the investigators had additionally obtained telephone data displaying that Mr. Prince’s buddy and former companion made a number of calls to the primary White House switchboard in late July 2019, after the mercenary operation bumped into bother.The accusation that Mr. Prince violated the U.N.’s arms embargo on Libya exposes him to doable U.N. sanctions, together with a journey ban and a freeze on his financial institution accounts and different belongings — although such an end result is unsure.Mr. Prince just isn’t the one one to have been accused of violating the decade-old arms embargo on Libya. Rampant meddling by regional and world powers has fueled years of preventing, drawing mercenaries and different profiteers looking for riches from a warfare that has introduced solely dying and distress to an important many Libyans.The sheer breadth of proof within the newest U.N. report — 121 pages of code names, cowl tales, offshore financial institution accounts and secretive weapons transfers spanning eight nations, to not point out a quick look by a Hollywood buddy of Mr. Prince — gives a glimpse into the secretive world of worldwide mercenaries. Libya started to fracture a decade in the past, when the violent ouster of the nation’s longtime dictator, Col. Muammar el-Qaddafi, set in movement a political disaster that splintered the nation into armed factions, many finally supported by international powers hoping to form the future of the oil-rich North African nation.Eastern Libya is now within the fingers of Khalifa Hifter, the highly effective militia commander whom Mr. Prince agreed to assist, based on the report, because the nation was wracked by preventing in 2019.A one-time CIA asset who returned from exile in Virginia after the autumn of Mr. Qaddafi in 2011, Mr. Hifter quickly established himself within the japanese metropolis of Benghazi as an aspiring strongman who was decided to blast his option to energy if mandatory.In his late 70s, Mr. Hifter has relied for years on the United Arab Emirates for funding, armed drones and a variety of highly effective weapons, based on successive United Nations reviews. More lately, Mr. Hifter has additionally acquired backing from Russia, within the guise of mercenaries with the Kremlin-linked Wagner Group that has grow to be an integral a part of his warfare machine.In April 2019, Mr. Hifter launched a blistering assault on the capital, Tripoli, however formidable obstacles stood in his means, together with newly arrived troops from Turkey supporting the U.N.-backed authorities. So Mr. Hifter turned to Mr. Prince.Mark Mazzetti contributed reporting from Washington.