why Davies did not consult with Lee before firing Johnston? Lee would have told him that Johnston was following the same strategy as he was. Davies was only looking for an excuse to get rid of Johnston. Come on, recognize Jefferson Davies vital contributions to union victory

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Davis did consult Lee by telegram and letter. Lee's response, as with most sensitive communications to Davis, was very tactful and careful. He said forthrightly that it was a bad idea to replace the commander of an army in the middle of a campaign, but also said he didn't know the specific circumstances in Georgia.
When directly asked about Hood, Lee replied that he was bold on the battlefield but "careless off" (pretty vague- I've spent years trying to figure out what Lee meant) and said directly that Hardee was more experienced.
In other words, Lee basically said that it probably wasn't a good idea to relieve Johnston, but that if Davis decided to do it, he should replace him with Hardee rather than Hood.