General Mark Milley
en.wikipedia.org's_Church_incident

...
St. John's Church incident
Milley wearing combat uniform walking behind Trump while escorting the President from the White House to St. John's Episcopal Church
Milley walking behind Trump from the White House to St. John's Episcopal Church on June 1, 2020

On June 1, 2020, during the protests in Washington, D.C., following the murder of George Floyd, Milley, in combat uniform, walked with the president from the White House across Lafayette Square to St. John's Episcopal Church about half an hour after federal officers and police had used tear gas and other riot control tactics to disperse protestors, drawing sharp criticism from former military officers and others.[74][75][76][77][78]

According to Peril, Milley attended the walk in combat fatigues as he had been summoned away at short notice from a planned visit to an FBI operations center, and immediately departed once he and Esper realized the political implications of the walk, saying that he felt "sick" and was "------- done with this ----" to Esper.[79][80] As a result, Milley was not present for Trump's photo op at St. John's Church.[79][81] The House Armed Services Committee subsequently requested that Esper and Milley testify before the committee about the military's role in the George Floyd protests, which they did on July 9.[82][83]
Unsent resignation letter

Milley reportedly considered resigning over the incident in front of the St. John's Church, going so far as to draft a highly critical resignation letter to President Trump, but then deciding against handing the letter over to him. The resignation letter draft was later published in 2022.[84] At the last minute before submitting the resignation letter to the president, Milley opted against resignation and instead apologized for his presence at the St. John's Church incident in a video recorded as his commencement address at the National Defense University on June 11. At the commencement speech he explained that he should not have been at the event because his presence created a perception of military involvement in domestic politics.[85][86] ...