They demonstrated through internal messages on the chat app Telegram how the Proud Boys — including the men on trial — were ecstatic when President Donald J. Trump called them out by name during a presidential debate in September 2020, when he told the group’s members to “stand back and stand by.”

The C also called a former Proud Boy, Matthew Greene, to the stand and had him explain to the jury that there was “a collective expectation” among the Proud Boys that violence would be used during political demonstrations.

“I believed from my experience that violence was celebrated,” Mr. Greene said.

At the same time, the prosecution began to paint a detailed picture of the Proud Boys’ collective emotional state in the postelection period, showing how the group became more frustrated with the legal and political systems and began edging closer to violence as Jan. 6 drew near.

Hundreds of Proud Boys took part in pro-Trump rallies in Washington in November and December 2020, both times clashing with leftist counterprotesters and ultimately turning on their traditional allies in the police, who they believed had sided with their adversaries.

The witness who helped describe these rising tensions was Jeremy Bertino, a former Proud Boy from North Carolina, who was gravely wounded in a street brawl after the rally in December. Mr. Bertino, after investigation by the government, pleaded guilty to seditious conspiracy and agreed to testify for the prosecution in the case.

Not sure all of them will get Sedition, but they will get prison time.