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.
The origins of the Civil War actually do surprise many when they get to read and understand what actually caused Americans to fight one another so long after gaining their own independence from the British. Main Causes of the American Civil War There are five main reasons for the outcome of Civil War in America; these causes were slavery, economy, Federal versus State rights, Abraham Lincoln becoming president and the Battle of Fort Sumter. Below is an explanation of each cause and how it impacted the outcome of war.