The picture you are referring to is the one from Ancient Egypt, I believe. The barge appears to be transporting t<span>wo obelisks and it can be assumed that they will be used for a temple.</span>
This was known as the Freedom summer
It was an initiative to get as many African-Americans to vote as possible in the elections in Mississippi. The initiative was organized because they had historically been segregated and were not allowed to vote through various means even when they did have constitutional rights to do so, ever since the civil war.
The Compromise of 1876 was a promise between Republican presidential candidate Hayes and Democrats in Congress. If the Democrats agreed to his election, he would recognize Democratic control of the South. Hayes also included a promise to withdraw troops from the south in his campaign