I've always been intrigued by the idea of reinforcing the eastern armies with Trans Miss troops in 1864. Interesting, even though I doubt that it would have made any difference in the ultimate outcome.

Notwithstanding Taylor's crossing failure in the summer of 1864, there seems to have been a glimmer of hope if for no other reason than Forrest claimed he could control the river. Don't recall the source offhand, but it was part of his rationale for allowing him to return to Mississippi and West Tennessee.

I can only assume that the Richmond beauracacy did not match up Forrest's claim, Taylor's failure, and the desire to cross troops. Otherwise, that's a combination of a couple of officers who knew how to get things done without asking for help. I believe that part of the reason for their success was their sense of reality regarding the odds they faced and the futility of hoping for material aid from the government.

I believe Lee was also cognizant of the reality of affairs in March 1865, but was determined to do his duty till the bitter end.

Perhaps he was hoping Kirby Smith would recognize that crossing the river now was relatively easier than any other time before then. And, that the Trans Miss illusion was one of the last cards left un-played.

No doubt, in March 1865, it was too little, too late; but I believe it illustrates the commitment to duty by Lee, however fatalistic.