The only two times Japan was ever successfully invaded by a foreign power occurred at Okinawa and Iwo Jima. In both cases, the invading power was the United States during World War II. Those islands were controlled by the Japanese, but invading American forces routed the Japanese under General MacArthur's island-hopping campaign in the Pacific theater. An interesting fact to note is that while the Americans invaded the Japanese, the Japanese also invaded US holdings among the Aleutian Islands in what is now Alaska.
Answer:
France and the Holy Roman Empire had geographical boundaries that are very easy to cross: they were rivers, streams, plains, or small forests. Only in the Southeast, the Alps represented a strong geographical boundary.
Beside, both regions had always been among the most densely populated in Europe, and this naturally led to conflicts due to competition for land and resources.
Finally, during most of their history, both France and the Holy Roman Empire were very unstable, being comprised by countless local lordships. This led to internal strife and external upheaval.
Boston police in US steel workers went on strike for higher wages and won
It is false