“I don’t think it’s defensible,” said Daniel Lucey, an infectious disease specialist at Dartmouth’s Geisel School of Medicine. “I’m extremely dismayed, disappointed and disillusioned to hear that the U.S. government would do that,” said Lucey, a former military physician who assisted in the response to the 2001 anthrax attacks.

In 2019, Trump authorized the Central Intelligence Agency to launch a clandestine campaign on Chinese social media aimed at turning public opinion in China against its government, Reuters reported in March. As part of that effort, a small group of operatives used bogus online identities to spread disparaging narratives about Xi Jinping’s government.

U.S. military leaders feared that China’s COVID diplomacy and propaganda could draw other Southeast Asian countries, such as Cambodia and Malaysia, closer to Beijing, furthering its regional ambitions.

A senior U.S. military commander responsible for Southeast Asia, Special Operations Command Pacific General Jonathan Braga, pressed his bosses in Washington to fight back in the so-called information space, according to three former Pentagon officials.

By summer 2020, the military’s propaganda campaign moved into new territory and darker messaging, ultimately drawing the attention of social media executives.

In regions beyond Southeast Asia, senior officers in the U.S. Central Command, which oversees military operations across the Middle East and Central Asia, launched their own version of the COVID psyop, three former military officials told Reuters.

Although the Chinese vaccines were still months from release, controversy roiled the Muslim world over whether the vaccines contained pork gelatin and could be considered “haram,” or forbidden under Islamic law. Sinovac has said that the vaccine was “manufactured free of porcine materials.” Many Islamic religious authorities maintained that even if the vaccines did contain pork gelatin, they were still permissible since the treatments were being used to save human life.

The Pentagon campaign sought to intensify fears about injecting a pig derivative. As part of an internal investigation at X, the social media company used IP addresses and browser data to identify more than 150 phony accounts that were operated from Tampa by U.S. Central Command and its contractors, according to an internal X document reviewed by Reuters.

Facebook executives had first approached the Pentagon in the summer of 2020, warning the military that Facebook workers had easily identified the military’s phony accounts, according to three former U.S. officials and another person familiar with the matter. The government, Facebook argued, was violating Facebook’s policies by operating the bogus accounts and by spreading COVID misinformation.

The military argued that many of its fake accounts were being used for counterterrorism and asked Facebook not to take down the content, according to two people familiar with the exchange. The Pentagon pledged to stop spreading COVID-related propaganda, and some of the accounts continued to remain active on Facebook.

Nonetheless, the anti-vax campaign continued into 2021 as Biden took office.

Angered that military officials had ignored their warning, Facebook officials arranged a Zoom meeting with Biden’s new National Security Council shortly after the inauguration, Reuters learned. The discussion quickly became tense.

“It was terrible,” said a senior administration official describing the reaction after learning of the campaign’s pig-related posts. “I was shocked. The administration was pro-vaccine and our concern was this could affect vaccine hesitancy, especially in developing countries.”