The events happened on 7th December are :


1941 : Pearl Harbor attack : On this day in 1941, Japanese bombers launched a surprise aerial attack on the U.S. naval base at Pearl Harbor on the island of Oahu, Hawaii, precipitating the entry of the United States into World War II.


1975 : Shortly after declaring its independence, East Timor was invaded and occupied by Indonesian forces.


1972 : American astronaut Eugene Andrew Cernan commanded the last manned flight to the Moon, effectively ending the Apollo program.


1941 : Adolf Hitler issued his Night and Fog Decree, a secret order for the arrest and execution of “persons endangering German security.”


1917 : The United States declared war on the Austro-Hungarian Empire during World War I.


1787 : Delaware became the first state to ratify the U.S. Constitution.


6th December | 8th December