The Schlieffen Plan was unsuccessful due to underestimating resistance and miscalculations, leading Germany to fight a two-front war.
False. The Schlieffen Plan was not successful. It failed due to various reasons such as underestimating Belgian and French resistance, the assumption that Britain would not intervene, and the miscalculation of the speed of Russian mobilization. Ultimately, the plan's failure led to Germany fighting a two-front war, contrary to its intended purpose.