In a video shared on Twitter, an attendee asks Flynn: "I want to know why what happened in Myanmar can't happen here". When the cheers die down, Flynn is heard to respond: "No reason". "No reason. I mean, it should happen here".
Response to the exchange was furious, with some calling for his court martial.
On Monday, Flynn published a desperate backtrack on a Telegram post for the messaging app.
Michael Flynn appeared to say there "should" be a Myanmar-style coup in the US.
Former national security advisor Michael Flynn, who worked briefly under former President Donald Trump, said Monday that there was "NO reason" for a military coup in the United States - one day after he appeared to suggest the opposite at a QAnon-themed convention over the weekend. As a JAG I'm qualified and also happy to prosecute this case'.
Vindman is the twin brother of Alexander Vindman, the retired Army lieutenant colonel who came to prominence in 2019 after testifying before Congress about Trump's dealings with Ukraine.
Both sat on the National Security Council before being fired shortly after the trial.
"The constitutionality of retirement jurisdiction over retirement crimes is what we are now challenging in the military Court of Appeals and the DC Circuit Court", he tweeted.
Vindman, a member of the US Army's legal arm, said the remarks were "seditious".
Myanmar's military overthrew the democratically elected government and has killed hundreds. "Myanmar used Dominion Voting Systems", a social media user posted.
"Hello, SecDef! Can a court martial?" Call him back to duty and then dishonorably discharge him. My tax payer dollars shouldn't be paying for his benefits, ' wrote one.
'Wow. There is no more betrayal, "another added".
'Why isn't Michael Flynn behind bars of fomenting a treasonous insurrection against the United States? "Indeed, rebellious words are not subject to Trump's amnesty", Muriel Burrows said.
'Recall General Michael Flynn to active duty immediately for purposes of court-martial. This must be done ASAP.' tweeted Jeannette Stone.
'Michael Flynn is clearly an enemy of the USA.
"Minimer? One Twitter user who noticed a mispronunciation of Flynn joked".
Returning to the Republican coup that is already underway ...
Trump supporters clash with police and security forces as people try to storm the US Capitol in Washington D.C.
Stephen Vladeck, an expert in national-security law at the University of Texas School of Law, said on Twitter that while Flynn is a retired Army officer, he's still subject to the Uniform Code of Military Justice.
'FBI please arrest this man. "He's asking Americans to go against the government!", Requesting another Twitter follower.
As Insider's Rachel E. Greenspan previously reported, Flynn has previously echoed the rhetoric of QAnon supporters, including past year the baseless theory that Dominion Voting Systems, which sells electronic voting hardware, rigged the 2020 election in President Joe Biden's favor.
In an interview broadcast on CNN, Trump supporters advocated a military coup, arguing that they would take over the elections, "redo", dismiss "Puppet President" Joe Biden, and hold Trump's new inauguration. Was.
In late 2020, Trump pardoned Flynn in a move that ended a yearslong criminal case related to the Russian Federation investigation.