There was a time when a C meant average. The average GPA at four-year colleges and universities has risen from 2.52 in the 1950s to 3.11 in 2006. And according to Stuart Rojstaczer, a former Duke University professor and founder of GradeInflation.com, GPAs only keep rising. At some colleges, Rojstaczer says, over 50% of the grades given are A's.
Trench warfare was caused by an advance in defensive weaponry. The machine gun was too heavy to be used as a mobile weapon, and therefore was placed into a fixed position. Barbed and concertina wire was also heavily used.
Interesting Facts about the Causes of World War I. Germany quickly attacked France, hoping to conquer France in the west before they had to fight the Russian army in the east. Throughout the late 1800s and early 1900s the major powers in Europe had been building up their armies and navies in an arms race.