World War I: After his platoon suffered heavy casualties during the Meuse–Argonne offensive in France's Forest of Argonne, American Corporal Alvin York led the 7 remaining men on an attack against a German machine gun nest; 25 German soldiers were killed and 132 captured.

World War I or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. Main areas of conflict included Europe and the Middle East, as well as parts of Africa and the Asia-Pacific. There were important developments in weaponry including tanks, aircraft, artillery, machine guns, and chemical weapons. One of the deadliest conflicts in history, it resulted in an estimated 30 million military casualties, plus another 8 million civilian deaths from war-related causes and genocide. The movement of large numbers of people was a major factor in the deadly Spanish flu pandemic.

The Meuse–Argonne offensive was a major part of the final Allied offensive of World War I that stretched along the entire Western Front. It was fought from September 26, 1918, until the Armistice of November 11, 1918, a total of 47 days. The Meuse–Argonne offensive was the largest in United States military history, involving 1.2 million American soldiers, sailors and marines, along with 800,000 French and 850 Siamese personnel. It is also the deadliest campaign in the history of the United States Army, resulting in over 350,000 casualties, including 28,000 German lives, 26,277 American lives and an unknown number of French lives. American losses were worsened by the inexperience of many of the troops, the tactics used during the early phases of the operation, and the widespread onset of the global influenza outbreak called the "Spanish flu."

The Forest of Argonne is a long strip of mountainous and wild woodland in northeastern France, approximately 200 km (120 mi) east of Paris. The forest measures roughly 65 km (40 mi) long and 15 km (9 mi) wide filled with many small hills and deep valleys formed by water run-off from the Aire and Aisne rivers rarely exceeding more than 200 m (650 ft) in elevation. Following the First World War, the landscape of the forest was forever changed as trench warfare led to parts of the forest being riddled with deep human-made trenches along with craters from explosives. The forest is bordered by the Meuse River on the west and rolling farmland and creeks to the east. The forest is largely oak, chestnut, and pine trees, and ferns cover much of the forest floor. Common animal life consists of wild boar, red deer, roe deer, hares, rabbits, foxes, and wildcat.