I think it is War Plan Orange, but I wouldn't take an oath.
Rome was a powerful and huge empire for a long time, which controlled most of Europe. It is important for many reasons. First, the Ancient Romans have influenced world’s culture and made a huge impact on the development of technology and science. Secondly, Roman Empire had a great political significance, since Romans were the first who created a Senate.
D) American railway union
Answer: The first Crusade was successful for European leaders they were able to have some cities such as Jerusalem, Acre, Bethlehem, and Antioch. But after that things go wrong.
The political perspective was a failure.
Although they did not fully achieve their religious goal, the Crusades promoted major changes across Europe, such as the reopening of the Mediterranean to European shipping and trade. This made it possible to intensify trade between the West and the East, largely interrupted by Muslim expansion.