How many Days of peace since World War I?

What countries did the Anglo Saxons invade or take over? What contribution did Jonas Salk make to science in the 1950s? How many brothers and sisters did the tsar of russia have? During the 1750s before the industrial revolution why did most people see little of the world? Where did the term copy come from? Were Martin Cash a hero or a villain? What is the main aim of nehru yuva kendra? What was World Bank formerly known as? What of these invention greatly contributed to the expansion of sea exploration in the 1400s? What was the food in the trenches of World War 1? Who is the first black producer in lugansk? Who represents the British king or queen in Canada's parliament? In 1763 did Great Britain lose control of North America? Who was Queen of England during World War 1? What is the protestant ethic? Who is bramha gupta? What was the crisis of western Europe immediately after World War 2? Is Duke of Northumberland Catholic? How did controlling the gold salt trade make songhai the largest empire in west Africa? How did Louis pasteurs invention change the world?