Why did belgium fight France in world war 2?

Belgium did not actively fight France during World War II; rather, it was invaded by Germany in May 1940. Belgium had declared neutrality at the outset of the war but was quickly overrun by German forces as part of their campaign against France and the Allies. The Belgian army fought alongside British and French forces against the German invasion but ultimately fell under occupation. The conflict was primarily between the Axis powers and the Allies, with Belgium caught in the crossfire.