Simplify the following text for a Grade 6 native English-speaking person.
Original: On 3 September 1939 France and Britain , followed by the countries of the Commonwealth , declared war on Germany but provided little support to Poland other than a small French attack into the Saarland .
Simplified: On September 3 , Britain and France declared war on Germany . They sent a small French attack on Western Germany which could not help Poland much .