In the last days of his term, he apparently had an intention to send these heavy guns, but his orders were revoked by the president. During the year 1860, the Southern states actually received less than their full quota of arms and the heavy guns were a normal shipment required to complete the construction of Federal forts.
His resignation as Secretary of War, on December 29, 1860, was precipitated by the refusal of Buchanan to order Major Robert Anderson to abandon Fort Sumter, which eventually led to the start of the war. On January 27, 1861, he was indicted by the District of Columbia grand jury for conspiracy and fraud. Floyd appeared in criminal court in Washington, D.C., on March 7, 1861, to answer the charges against him. According to Harper's Weekly, the indictments were thrown out." http://en.wikipedia.org/wiki/John_B._Floyd Stan