Here is the chronological order of the events you provided from earliest to most recent:
- Britain and France declared war on Germany (September 3, 1939)
- Germany invaded Poland (September 1, 1939)
- Germany invaded the low countries and France (May 10, 1940)
- The Battle of Britain began (July 10, 1940)
So the correct order is:
- Britain and France declared war on Germany
- Germany invaded Poland
- Germany invaded the low countries and France
- The Battle of Britain began