I would suggest Terrikins that you do some reading I am correct in my post.

If you would like further reading try having a look at the following:

"Lastly, there was the Field General courts-martial, which could only be convened if the accused was on active service or was stationed overseas and it was therefore not practicable to try him in any other military court"

Given that other options were freely available after the surrender of the rising General Maxwell COULD and SHOULD have taken them.