Rare Red River Campaign ALS by General Canby (autographed) to General Banks "Mouth of the Red River May 14 1864 Your despatch to Gen Warren has just received there, There are but 600 troops here but others have been ordered from above and below and will cooperate with you fully as possible.."  The day of the letter Banks was in full retreat from the battle of Mansfield.  Rare war date document from this rare campaign in Louisiana.