The Battle of Yonkers was the United States' first large scale, official engagement of the Zombie War. It took place in Yonkers, New York, the largest city in Westchester County. The battle was an unmitigated catastrophe. Poor planning, impractical equipment and outdated tactics all played their part, and culminated into the 4 million-strong zombie horde overwhelming the military. Yonkers was abandoned, and public confidence was non-existent, and was one of the primary causes of the excesses of the Great Panic.