Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II? Why did Japan expand into Korea and Manchuria during the early 1900s prior to World War II?