First solve this problem 2 7/8 - (-3/20)
To suppress black republican voters and poor white republicans from being able to register to vote which pretty much eliminated the republican party in the south for decades and the democrats gained one party control through the southern states.
World War I completely changed the way wars were fought.
Trench warfare, which was the norm just a century ago was seen as an nonviable strategy.
Modern machines such as tanks and airplanes made trench warfare mostly about keeping ground and resulted in stalemates.
Also, it was the first time that modern tanks, planes and machine guns were being used for first time at such a large scale, resulting in an unprecedented level of death and carnage.
Military generals soon realized that time-honored military code of conducts were now obsolete and a completely new form of strategy was now required.
1. The crew and supply the ship can carry and handle.
2. The period and duration of exploration. The main issue of every travel and exploration was the time it took the ship from its origin to the supposed destination. The new types of sailing ships was more improved applied with machinery as the centuries past and traveling went from years to months to days.
3. In times of war or conflict
