No, are you willfully ignorant? Or is it possible that you are not aware that there were two units called the 1st Louisiana Native Guard? There was the short-lived Louisiana militia unit formed in May 1861 and was denied service in the confederate army. It was ordered disbanded in February or March of 1862. The second 1st Louisiana Native Guard was raised in September 1862 and incorporated into the Union Army where it was later re-designated 73rd USCT. The picture is of black soldiers wearing obvious Union uniforms - especially Union winter overcoats. I doubt overcoats were in much demand in Louisiana.
Letter of Private Frank Bailey, 34th New York Infantry Regiment to his brother in Middleville, New York: - “West Point, Virginia, 12 May 1862 - I hear that the Rebels sent out a Regt. of ni**ers to fight our men and that they were as naked as when they were born, except the brogues on their feet, and they incited to all sorts of cruelty. It is said that they cut the throats of our wounded and then rob them of every article of any value. The soldiers are death on ni**ers now. If they catch a ni**er in the woods, and there is no officer near, they hang them without any ceremony. Now if this is true that the Southern chivalry as they style themselves put these ni**ers up to such deeds as this, may the curse of good light on them. It is worse than the English were in the Revolution to hire the Indians, but their race is about run when they stoop to such barbarism as that. Yesterday there was two ni**ers hung close by here by our men. One of them had $20.00 government note in his pocket. There is no mistake but the Rebels have black soldiers for I have seen them brought in as prisoners of war. I saw one who had the stripes of an orderly sergeant on his coat. I don't beliee in taking them prisoner, but kill them where ever they find them, that they may never more curse the land with their hateful presence.”