Im going with Germany because Spain and Russia can be like ruled out and Austria was part of the Monarchy
I think you are referring to (latitude).
Hello!
I believe this picture refers to the Vietnam War. During and before the war they were a lot of people protesting, much like this sign.
I hope it helps!
Answer:
The Thirteenth; Fourteenth and Fifteenth ammendmends were all important but the Fifteenth amendment is the most important of the three because It prohibits discrimination in voting rights on the basis of race, color or previous conditions of slavery and voting was allowed in some states of the US at that time providing some requirements.