History of Airplanes

 I wrote a brief history of airplanes. 

History of Balloons

 I wrote a brief history of balloons 

History of Ships

 I wrote a brief history of ships 

Katyn Admission

 On 13 April 1990 the Soviet Union finally admitted responsibility for the Katyn Massacre (the murder of Polish officers in 1940).

History of Submarines

 I wrote a brief history of submarines 

History of Sewers

 I wrote a brief history of sewers 

History of Creationism

 I wrote a brief history of Creationism