Which battle is considered to be a turning of the point

What does the document of the birtish octopus is an uderlying cause of the world war 1

Which of the following was probably the most difficult challenge facing construction of the railroad?

The massacre at sand creek was an attack by a colorado militia on peaceful american indians. a colorado militia on a group of dakota warriors. american indians on peaceful white settlers. federal soldiers on a group of cheyenne warriors.