We knew that it would also cause a chain reaction of war..
After<span> three years of a bloody and frustrating </span>war<span>, the United States, the People's Republic of China, North </span>Korea<span>, and South </span>Korea<span> agree to an armistice, bringing the</span>Korean War<span> to an </span>end<span>. The armistice </span>ended<span> America's first experiment with the Cold </span>War<span> concept of “limited </span>war<span>.”</span>
Answer: The German attack on France in the 1940s was a success. Germany took over France in that attack, even using their own trench guns against them.
Explanation: France made a mistake after WWI by spending a tone of money on building a massive trench system around France in case of a 2nd world war. However, trench warfare was deemed to be useless in WWII, so useless that the Germans used the machine guns inside of those trenches against the French.
One advancement was the creation of the alphabet (Which most of the current alphabets are based on.)