Yes Military Tribunals for a select few happened in late 2017 as suggested before. This graphic explains the reason Trump had to delay the process throughout 2017 until Q started posting 10.28.17.
Obama did issue a pardon for himself and others. That's why Trump tweeted about pardoning himself. Obama thought (they) could get Trump impeached by June 2017, and the pardons were an attempt to stall and delay for six months and avoid immediate arrests once Trump took office.
Regardless, Trump was patient and built the entire case against all of them first from every angle. Federal. State. Military. International.
And then in late 2017, Trump was able to begin Military Tribunals for all of it collectively.
This graphic simply explains the timing and steps Obama undertook to stall and delay while trying to get his MSM buddies to force an impeachment.