Answer:
The Tennis Court Oath or Serment du Jeu de Paume in French was a oath taken by the members of the third estate in France which is an important event prior to the French Revolution.
At that time France was combined of three society, which are Clergy, nobility and the Third estate. The third estate used to represents the common people of the France. These three groups used meet at the Estate General time to time. On a convention in 1789 the Third estate groups declared themselves as the National assembly as they out numbered the other groups. But on 20th June they find themselves locked in the conference room and realized the king is going to prevent them. Based on the situation the 576 members of 577 members went to a nearby tennis court and took oath that whatever the situation, they will not separate and segregate until the the written constitution is formed.
Their vow to this oath made the king to order the Clergy and the Nobility to join them in the assembly. This event made a mark for the third estate that the decision making power of the nation is not only held by the king. The political parties are the representative of the people rather than King.
This event led the French Revolution one step ahead.
Explanation:
Things that have happened in the past.
Answer: Lincoln was wanting to retain the support of some states which allowed slavery but were loyal to the Union.
Historical context/details:
President Abraham Lincoln issued The Emancipation Proclamation as an executive order on January 1, 1863. The executive order declared freedom for slaves in ten Confederate states in rebellion against the Union. It also allowed that freed slaves could join the Union Army to fight for the cause of reuniting the nation and ending slavery.
While Lincoln personally was strongly against slavery, he had to tread carefully in his role as president and commander-in-chief. The Emancipation Proclamation was carefully worded in order to retain the support of four border slave states, which remained in the Union though they were states that permitted slavery, were Maryland, Missouri, Delaware, and Kentucky. Lincoln wanted to keep those states loyal to the Union cause.