How were the invasions of China and Poland different?

The invasion of China started World War II. The invasion of China started World War II.
The Nazi invasion of Poland took longer than Japan’s invasion of China..
The invasion of Poland started World War II.
The Nazi invasion of Poland was opposed by Western nations, while Japan’s invasion of China was not.

The invasion of China by Japan was part of a larger conflict known as the Second Sino-Japanese War, which began in 1937. The invasion of China eventually led to Japan's entry into World War II in 1941 after the attack on Pearl Harbor. The invasion of Poland by Nazi Germany, on the other hand, directly triggered the start of World War II in Europe in 1939.

The Nazi invasion of Poland was met with opposition from Western nations such as France and Britain, who declared war on Germany in response to the invasion. This marked the beginning of the wider conflict in Europe. In contrast, Japan's invasion of China was not met with the same level of opposition from Western nations, and did not directly lead to the involvement of major world powers in the conflict until later on.