That's why I provided the quote. I was curious at the time what Shelby Foote was going on about. I don't know where he gets that Lee was asked to go West to
specifically superintendent the relief of Vicksburg, and that Lee declined. That's a big deal.
However, I found references in Gen. Longstreet memoirs to a conversation he had with General Lee about Vicksburg. Longstreet wrote that after the Battle of Chancellorsville he reported to General Lee, and as he wrote it:
"I offered the suggestions made to Secretary Seddon, in regard to the means that should be adopted for the relief of Vicksburg… I suggested that General Johnston, instead of trying to collect an army against General Grant, should be sent to reinforce General Bragg, then standing against the Union forces under General Rosecrans in Middle Tennessee; that at the same time he should send my divisions, just up from Suffolk, to join Johnston's reinforcements to Bragg's army; that the combination once made should strike immediately in overwhelming force upon Rosecrans, and march for the Ohio River and Cincinnati.
He recognized the suggestion as of good combination, and giving strong assurance of success, but he was averse to having a part of his army so far beyond his reach. He reflected over the matter one or two days, and then fell upon the plan of invading the Northern soil and so threatening Washington as to bring about the same hoped-for result. To that end he bent his energies.
His plan or wishes announced, it became useless and improper to offer suggestions leading to a different course... His confidence in making moves threatening Washington and the invasion of Maryland and Pennsylvania grew out of the known anxiety of the Washington authorities as to the safety of their capital and of quiet within the Union lines."
Excerpt From
From Manassas to Appomattox, James Longstreet
History · 1904
books.apple.com
If this thread hadn't gone off course for a long while, it would have been interesting to see if there's anything else about this, particularly because I know there are some readers in this forum who have read D.S. Freeman and other books about Lee and who know him a heck of a lot better than I do and perhaps there are other references about this that I don't know about.
Incidentally if one asks AI, the answer is all over the place, but at no point makes any reference to an interview Foote specifically gave where he mentioned not attrition, but opportunity cost.