Question: The Battle of Gettysburg and Meuse-Argonne Offensive are both battles fought during what? 

The mission of the 204th Brigade Support Battalion, "Rough Riders," is to, on order, deploy and execute responsive Combat Service Support and Combat Health Support in support of the 2nd Brigade Combat Team, 4th Infantry Division's objectives.  ("Rough Riders") was originally constituted as the 5th Sanitary Trains on 10 November 1917 at Camp Logan, Texas.  During World War I, the unit fought in numerous battles and campaigns including the Battle of Saint-Mihiel, Meuse-Argonne Offensive, and the Battle of Champagne, at Lorraine.  After the First World War, the unit was reorganized and re-designated on 29 January 1921 as the 5th Medical Regiment.  The 5th Medical Regiment was inactivated in August 1921 at Camp Jackson, South Carolina. <SEP>  It was fought from 26 September 1918 until the Armistice of 11 November 1918, a total of 47 days.  The Meuse-Argonne Offensive was the largest in United States military history, involving 1.2 million American soldiers.  It was one of a series of Allied attacks known as the Hundred Days Offensive, which brought the war to an end. The Meuse-Argonne Offensive, also known as the Maas-Argonne Offensive and the Battle of the Argonne Forest, was a major part of the final Allied offensive of World War I that stretched along the entire Western Front.  The battle cost 28,000 German lives and 26,277 American lives.  It was the largest and bloodiest operation of World War I for the American Expeditionary Force (AEF), which was commanded by General John J. Pershing, and one of the deadliest battles in American history.  American losses were exacerbated by the inexperience of many of the troops, and tactics used during the early phases of the operation. <SEP> The Meuse-Argonne American Cemetery and Memorial is a 130.5 acre World War I cemetery in France.  It is located east of the village of Romagne-sous-Montfaucon in Meuse.  The cemetery contains the largest number of American military dead in Europe (14,246), most of whom lost their lives during the Meuse-Argonne Offensive and were buried there.  The cemetery consists of eight sections behind a large central reflection pool.  Beyond the grave sections is a chapel which is decorated with stained glass windows depicting American units' insignias.  Along the walls of the chapel area are the tablets of the missing which include the names of those soldiers who fought in the region and in northern Russia, but have no known grave.  It also includes the Montfaucon American Monument.  This cemetery is maintained by the American Battle Monuments Commission.  It is open daily to the public from 9:00 a.m. to 5:00 p.m.  The cemetery is closed January 1 and December 25, but is open on all other holidays. <SEP>  The battle involved the largest number of casualties of the entire war and is often described as the war's turning point. The Battle of Gettysburg ( , with an sound) was fought July 1–3, 1863, in and around the town of Gettysburg, Pennsylvania, by Union and Confederate forces during the American Civil War.  Union Maj. Gen. George Meade's Army of the Potomac defeated attacks by Confederate Gen. Robert E. Lee's Army of Northern Virginia, halting Lee's invasion of the North.