In August, Johnston was promoted to full general—what is called a four-star general in the modern U.S. Army—but was not pleased that three other men he had outranked in the "old Army" now outranked him, even though Davis backdated his promotion to July 4. Johnston felt that since he was the senior officer to leave the U.S. Army and join the Confederacy he should not be ranked behind Samuel Cooper, Albert Sidney Johnston, and Robert E. Lee. Only Beauregard was placed behind Johnston on the list of five new generals. This led to much bad blood between Johnston and Jefferson Davis, which would last throughout the war. The crux of Davis's counterargument was that Johnston's U.S. commission as a brigadier general was as a staff officer and that his highest line commission was as a lieutenant colonel; both Sidney Johnston and Lee had been full colonels. Johnston sent an intemperately worded letter to Davis, who was offended enough to discuss its tone with his cabinet.