7th » Booker T. Washington becomes the first African American to be depicted on a United States postage stamp.
9th » World War II: Operation Weserübung Nazi Germany called Germany invades Denmark and Norway.
9th » Vidkun Quisling seizes power in Norway.
14th » World War II: Royal Marines land in Namsos, Norway in preparation for a larger force to arrive two days later.
15th » The Allies of World War II known as Allies begin their attack on the Norway known as Norwegian town of Narvik which is occupied by Nazi Germany.
23rd » The Rhythm Night Club fire at a dance hall in Natchez, Mississippi, kills 198 people.
Famous Birthdays on April in 1940
1st » Wangari Maathai, Kenyan environmentalist, Nobel Peace Prize or Nobel Prize laureate (d. 2011)