Question: Which attack took place during the Hundred Days Offensive:  Meuse-Argonne Offensive or Battle of Guam?

full_context: Document 1: Operation Flintlock (World War II): Operation Flintlock was the campaign against the Japanese in the Marshall Islands in the Pacific theatre of World War II, from 31 January to 4 February 1944. The operation involved the invasions of Kwajalein, Eniwetok, and Majuro atolls. Admiral Nimitz, Commander of the U. S. Pacific Fleet, chose two islands in Kwajalein Atoll, Roi-Namur Island and Kwajalein Island, as primary targets in the U. S. invasion of the Marshall Islands.  Kwajalein Atoll contained communication and weather observation units and two Japanese airstrips on Roi-Namur and Kwajalein Islands, a seaplane base situated at Ebeye Island, a submarine base at Roi-Namur Island, and other Japanese installations scattered on various islands throughout Kwajalein atoll.  Kwajalein atoll, particularly Roi-Namur and Kwajalein Islands, were subjected to heavy bombardment. This attack also sank a large number of Japanese ships in Kwajalein Lagoon. Bitter fighting between Japanese forces and the U. S. 4th Marine Division on Roi-Namur, and the U. S. 7th Infantry Division on Kwajalein, resulted in a U. S. victory on 4 February 1944. The attack of the Japanese in the Marshall Islands was the first US attack, and capture, of Japanese territory, since the land was held by Japan before the start of World War II. The capture of Kwajalein Atoll during Operation Flintlock provided American forces with a base of operations that assured the recapture of the Philippines and eventually the fall of Japan.
Document 2: Battle of the Bulge: The Battle of the Bulge (16 December 1944 – 25 January 1945) was the last major German offensive campaign on the Western Front during World War II. It was launched through the densely forested Ardennes region of Wallonia in eastern Belgium, northeast France, and Luxembourg, towards the end of World War II. The surprise attack caught the Allied forces completely off guard. American forces bore the brunt of the attack and incurred their highest casualties of any operation during the war. The battle also severely depleted Germany's armored forces, and they were largely unable to replace them. German personnel and, later, Luftwaffe aircraft (in the concluding stages of the engagement) also sustained heavy losses.
Document 3: Battle of Guam (1944): The Second Battle of Guam (21 July – 10 August 1944) was the American recapture of the Japanese-held island of Guam, a U.S. territory in the Mariana Islands captured by the Japanese from the U.S. in the 1941 First Battle of Guam during the Pacific campaign of World War II.
Document 4: Meuse-Argonne American Cemetery and Memorial: 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.
Document 5: Battle of Peleliu: The Battle of Peleliu, codenamed Operation Stalemate II by the United States military, was fought between the U.S. and the Empire of Japan during the Mariana & Palau Campaign of World War II, from September to November 1944, on the island of Peleliu.
Document 6: American Expeditionary Forces: The American Expeditionary Forces (AEF) was the expeditionary force of the United States Army during World War I. It was established on July 5, 1917, in France under the command of General John J. Pershing. During the United States campaigns in World War I it fought alongside the French Army, British Army, and Canadian Army on the Western Front, against the German Empire. A minority of the AEF troops also fought alongside the Italian Army in that same year, against the Austro-Hungarian Army. The AEF helped the French Army on the Western Front during the Aisne Offensive (at the Battle of Château-Thierry (1918) and Battle of Belleau Wood) in the summer of 1918, and the AEF fought its major actions in the Battle of Saint-Mihiel and the Meuse-Argonne Offensive in the latter part of 1918.
Document 7: Lost Battalion (World War I): The Lost Battalion is the name given to nine companies of the United States 77th Division, roughly 554 men, isolated by German forces during World War I after an American attack in the Argonne Forest in October 1918. Roughly 197 were killed in action and approximately 150 missing or taken prisoner before 194 remaining men were rescued. They were led by Major Charles White Whittlesey. On 2 October, the division quickly advanced into the Argonne, under the belief that French forces were supporting the left flank and two American units including the 92nd Division were supporting the right flank. Unknown to Whittlesey's unit, the French advance had been stalled. Without this knowledge, the Americans had moved beyond the rest of the Allied line and found themselves completely cut off and surrounded by German forces. For the next six days, suffering heavy losses, the men of the division were forced to fight off several attacks by the Germans.
Document 8: Inarajan Pillbox: The Inarajan Pillbox is a World War II-era defensive fortification near the mouth of Inarajan Bay in the United States territory of Guam. Set on a limestone outcrop on the south side of the bay, the fortification occupies a natural niche in the formation, with a wall of piled coral rocks and cement covering part of the opening. This wall is about 1.8 m long, 2.0 m high, and 1.0 m thick. A cement gunport is set in the wall, about 0.75 m above ground level. This fortification was built by Japanese soldiers occupying Guam between 1941 and 1944. The structure was listed on the National Register of Historic Places in 1991, as "Inalahan Pillbox".
Document 9: Hundred Days Offensive: The Hundred Days Offensive was the final period of the First World War, during which the Allies launched a series of offensives against the Central Powers on the Western Front from 8 August to 11 November 1918, beginning with the Battle of Amiens. The offensive essentially pushed the Germans out of France, forcing them to retreat beyond the Hindenburg Line, and was followed by an armistice. The term "Hundred Days Offensive" does not refer to a specific battle or unified strategy, but rather the rapid series of Allied victories starting with the Battle of Amiens.
Document 10: Battle of Mindanao: The Battle of Mindanao was fought by United States forces and allied Filipino guerrillas against the Japanese from 10 March - 15 August 1945 on the island of Mindanao in the Philippines in a series of actions officially designated as Operation VICTOR V. It was part of the campaign to liberate the Philippines during World War II. The battle was waged to complete the recapture of the southernmost portions of the archipelago.
Document 11: Battle of Angaur: The Battle of Angaur was a battle of the Pacific campaign in World War II, fought on the island of Angaur in the Palau Islands from 17 September—22 October 1944. This battle was part of a larger offensive campaign known as Operation Forager which ran from June 1944 to November 1944 in the Pacific Theater of Operations, and Operation Stalemate II in particular.
Document 12: Battle of Bataan (1945): The Battle for the Recapture of Bataan from 31 January to 21 February 1945, by US forces and Allied Filipino guerrillas from the Japanese, part of the campaign for the liberation of the Philippines, was waged to secure the western shore of Manila Bay to enable the use of its harbor and open new supply lines for American troops engaged in the crucial battle for the liberation of Manila.
Document 13: Faha Massacre Site: The Faha Massacre Site is located just behind the Pigua cemetery in the village of Merizo on the United States island of Guam. The site is demarcated by four concrete pillars, connected by metal cables, with several crosses placed inside that area. A metal plaque mounted on a concrete block commemorates the thirty native Chamorro men who were slaughtered here on July 16, 1944 by members of the Imperial Japanese Army (IJA) during the Japanese occupation of the island during World War II. The IJA routinely forced Guam's native population to work on its construction projects. The men who were killed here were rounded up for a work crew; why they were killed is unclear, as there were no survivors. The massacre took place one day after the Tinta Massacre (in which 46 were killed), and about one week before the liberation of the island began.
Document 14: Battle of the Somme: The Battle of the Somme (French: "Bataille de la Somme" , German: "Schlacht an der Somme" ), also known as the Somme Offensive, was a battle of the First World War fought by the armies of the British and French empires against the German Empire. It took place between 1 July and 18 November 1916 on both sides of the upper reaches of the River Somme in France. The battle was intended to hasten a victory for the Allies and was the largest battle of the First World War on the Western Front. More than 3 million men fought in this battle and one million men were wounded or killed, making it one of the bloodiest battles in human history.
Document 15: Meuse-Argonne Offensive: 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. 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 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.
ground_truth: Meuse-Argonne Offensive