When the state of Louisiana seceded from the Union the United States arsenal at Baton Rouge was seized by the state authorities, who took forcible possession of the arms and munitions of war that they found there. When he was planning to capture the arsenal at St. Louis, Governor Jackson found that he needed some artillery with which to open fire from the hills that command the arsenal, which is on low ground on the bank of the river.
Governor Jackson sent two officers to the Confederate capital, which was then at Montgomery, Alabama, to make an appeal to Jefferson Davis for artillery from the lot taken at Baton Rouge, and explain for what it was wanted. President Davis granted the request, ordered the commandant at Baton Rouge to deliver the artillery and ammunition as desired, and he wrote at the same time to Governor Jackson as follows:
* * * After learning as well as I could from the gentlemen accredited to me what was most needed for the attack on the arsenal, I have directed that Captains Greene and Duke should be furnished with two 12-pound howitzers and two 32-pound guns, with the proper ammunition for each. These, from the commanding hills, will be effective against the garrison and to break the inclosing walls of the place. I concur with you in the great importance of capturing the arsenal and securing its supplies. * * * We look anxiously and hopefully for the day when the star of Missouri shall be added to the constellation of the Confederate States of America.
With the best wishes I am, very respectfully, yours,
Jefferson Davis.
The cannon and ammunition reached St. Louis on the eighth of May, and were immediately sent to Camp Jackson. The negotiations for them had been known to Blair and Lyon, and as soon as they learned of the arrival of the material which would be so useful in capturing the arsenal, they determined to act. Captain Lyon, as before stated, went in disguise through the camp on the ninth, saw with his own eyes the cannon and ammunition, learned that they had come from Baton Rouge, and was told for what purpose they were intended.
Here was the stolen property of the United States in the hands of the enemies of the government, and intended to be used for further thefts by violence. There could be no doubt of his duty in the matter, except in the mind of a secessionist or his sympathizer.
By the secessionists the capture of Camp Jackson was looked upon as a great outrage, for which the Union men had no authority under the Constitution and laws either of the United States or of the state of Missouri. It was a peculiar circumstance of the opening months of the rebellion, and in fact all through it, that the rebels and their sympathizers were constantly invoking the Constitution of the United States wherever it could be brought to bear against the supporters of the government; so much was this the case that in time it came to be almost a certainty that any man who prated about the Constitution was on the side of the rebellion. The men who were ready to violate it were those who constantly sought to shield themselves behind it.
As an illustration of this state of affairs, may be cited the letter of Governor Jackson in reply to the proclamation of President Lincoln calling for seventy-five thousand troops for three months, “to maintain the honor, the integrity and the existence of our National Union, and the perpetuity of popular government; * * * and to repossess the forts, places, and property which have been seized from the Union.”