I think you meant to spell Nile instead of Nike... so the civilization that matches with the Nile is Egypt
Border ruffians contributed to the "bleeding Kansas" problem by actively terrorizing citizens of the free state. The Border ruffians came from the slave state of Missouri and in an attempt to change attitudes through force, they would actively terrorize opponents to their pro-slavery stance. The "bleeding Kansas" problem occurred as is was decided around the time of 1950 that the settlers themselves would choose whether Kansas was a free or slave state. This resulted in a flood of people from both sides rushing to settle Kansas in order to gain another state that aligned with their particular values. The period lasted until about 1959-60 and animosity persisted through the civil war.
I believe the answer is: It was weakened and could not provide military protection.
Land reclamation refers to the process of creating new land by elevating the land that covered by the sea or lake and extracting the water out.
Due to the large budget for this project, the government have less money to be allocated for military supplies and soldiers.
Because she saved millions of slaves with the underground railroad , and directed them north!