Battle of Marne: One of the early major battles on the Western Front during World War I, where Allied forces successfully halted and pushed back Germany's attempt to advance towards Paris. It marked a turning point in the war.
Schlieffen Plan: A German military strategy developed before World War I that aimed to quickly defeat France through a swift invasion via Belgium while keeping Russia at bay. Its failure contributed significantly to the prolonged nature of trench warfare on the Western Front.
Ludendorff Offensive: Also known as Operation Michael, it was Germany's last major offensive on the Western Front in 1918. Although initially successful, it ultimately failed and marked a turning point in favor of Allied forces.