those who assert that the Confederacy was the belligerent party. They maintain that the Confederacy started the war by initiating combat at Fort Sumter. Miscellaneous Other names for the conflict include "The Confederate War," "Buchanan's War," "Mr. Lincoln's War," and "Mr. Davis's War." In 1892, a D.C. society of war-era nurses took on the name National Association of Army Nurses of the Late War, with "late" meaning simply "recent". More euphemistic terms are "The Late Unpleasantness" and "The Recent Unpleasantness." Other postwar names in the South included "The War of the Sections" and "The Brothers' War," especially in the border states. Names of battles and armies There is a disparity between the sides in naming some of the battles of the war. The Union forces frequently named battles for bodies of water or other natural features that were prominent on or near the battlefield, but Confederates most often used the name of the nearest town or artificial landmark. The historian Shelby Foote explained that many Northerners were urban and regarded bodies of water as noteworthy, but many Southerners were rural and regarded towns as noteworthy. That caused many battles to have two widely-used names. However, not all of the disparities are based on those naming conventions. Many modern accounts of Civil War battles use the names established by the North. However, for some battles, the Southern name has become the standard. The National Park Service occasionally uses the Southern names for its battlefield parks located in the South, such as Manassas and Shiloh. In general, naming conventions were determined by the victor of the battle. Examples of battles with dual names are shown in the table. Civil War armies were also named in a manner reminiscent of the battlefields since Northern armies were frequently named for major rivers (Army of the Potomac, Army of the Tennessee, Army of the Mississippi), and Southern armies for states or geographic regions (Army of Northern Virginia, Army of Tennessee, Army of Mississippi). Units smaller than armies were named differently in many cases. Corps were usually written out (First Army Corps or simply First Corps), but a postwar convention developed to designate Union corps by using Roman numerals (XI Corps). Often, particularly with Southern armies, corps were more commonly known by the name of the leader (Hardee's Corps, Polk's Corps). Union brigades were given numeric designations (1st, 2nd, etc.), but Confederate brigades were frequently named