Final answer:
The Battle of Argonne Forest ended in victory for the Allies, and an armistice was requested by the German high command, leading to the end of combat on November 11, 1918.
Step-by-step explanation:
The American lieutenant wrote home expressing his farewells, and four days later, he was killed. This occurred during the Meuse-Argonne Offensive, a significant battle near the end of World War I. The Battle of Argonne Forest ended in victory when the Allies finally pushed back the Germans and broke through the enemy lines on November 11, 1918, culminating in the armistice that ended the fighting. The German high command came to realize that continuing the war would only lead to further unnecessary deaths and loss, prompting them to request the armistice even though German troops were still occupying parts of France and Belgium.