It had to be launched at high tide to be successful, which meant that only twenty-three days were available for practice. It was so successful, though, that a mere thirteen days after it began, it had achieved its objective. Devised by MacArthur as a plan to break out of the Pusan perimeter, it was 
It had to be launched at high tide to be successful, which meant that only twenty-three days were available for practice. It was so successful, though, that a mere thirteen days after it began, it had achieved its objective. Devised by MacArthur as a plan to break out of the Pusan perimeter, it was a brilliant success, as the invasion behind enemy lines allowed the South Korean forces to advance nearly the length of Korea in less than a month. For ten points, what was this invasion which commenced on September 15, 1950?
It had to be launched at high tide to be successful, which meant that only twenty-three days were available for practice.
{INCHON} invasion