If they are grayed out then the person who made the map does not want you to focus on those area's
The grumpy teenagers led a rebellion when told to do chores by their parents.
The war led to inflation and many poorer families could not afford the increase in food prices. The impact of the German U-boat campaign also led to food shortages and this hit home when rationing was brought in by the government in February 1918.Mar 6, 2015
Normally you would put the topic in the center of a diagram