Who is Vindman and what did he do?

OK, 95% of the posters on this forum hate LTC Vindman. I understand that, and I have no desire to argue that point. I just want to see if we can reach some consensus as to exactly who this man is and what he did.

It is my hope that EVERYONE can set aside agreement or disagreement with his views and/or actions and that we can simply focus upon the objective FACTS. Exactly WHAT HAPPENED?

As I understand it, he is a career military officer who was assigned to the NSC as an expert on Eastern Europe in general and Ukraine in particular. In that capacity and in the ordinary course of his duties, he was party (listened passively in the Situation Room) to the telephone call between POTUS and the president of Ukraine. While he listened real-time, he did not actively participate. Apparently, it is the norm for calls of this type for the NSC regional expert to listen.

Rightly or wrongly, he was concerned about the propriety of certain elements of that call, and he reported those concerns to his superiors at the NSC. Did he run to the press or anything of that nature? I have not seen that this is the case. Is there any DIRECT evidence that he took his concerns directly to Congress or to anyone other than superiors at the NSC? Yes, there has been plenty of speculation, but I am asking about objective fact.

I fully understand that many do not share his concerns. Again, agreement or disagreement is NOT the subject of this post.

His role as a passive participant in the telephone call was apparently not a secret of any sort. When the call became controversial, Congressional Dems issued a subpoena for his testimony about the call. Did he actively solicit a Congressional subpoena? Again, there has been speculation, but I have not seen any EVIDENCE that this is the case. Is there any?

Unlike a number of members of the Trump administration, LTG Vindman did NOT defy the Congressional subpoena and appeared to testify before a Congressional committee, as directed by the subpoena.

I have seen arguments that committed treason or insubordination or one of a dozen other legal or ethical violations by complying with the subpoena. I understand fully that many do not LIKE the Congressional subpoena, but I ask that we PLEASE set that dispute aside for the moment. Partisan motivations aside, Congress clearly DOES have the authority to issue subpoenas, and it did so.

Simple question — Did POTUS directly order Vindman to defy the Congressional subpoena? (I note in passing that Hope Hicks also complied in part with Congressional subpoenas, in DIRECT defiance of instructions from POTUS). I have not seen that POTUS issued any such order to Vindman.

This is an important question. If POTUS did issue such an order, it would create a major conflict between (a) that order from the C-in-C to a military officer and (b) a validly-issued Congressional subpoena. Absent such an order, however, how could Vindman be guilty of any malfeasance by complying with a legal subpoena?