Honestly, none. The union didn't really have any agricultural advantages over the Confederacy, in fact, it can be argued that agriculture was one of the biggest disadvantages of the union.
The U.S. army in Europe was under the command of General John J. Pershing. At first, the U.S. had few trained troops to send over to Europe. However, the army was quickly built up through the draft and volunteers. By the end of the war around 2 million U.S. troops were in France. American troops on way to the front march thru London Source: Department of Defense The U.S. troops arrived just in time to turn the tide of the war in favor of the Allies. Both sides were exhausted and running out of soldiers. The influx of fresh troops helped to boost the morale of the Allies and played a major role in the defeat of the Germans.
Answer:
Bell Trade Act, formally Philippine Trade Act of 1946, an act passed by the U.S. Congress specifying the economic conditions governing the emergence of the Republic of the Philippines from U.S. rule; the act included controversial provisions that tied the Philippine economy to that of the United States.
The major physical feature that you would have to cross in order to reach this destination would be the Appalachian Mountains, since these were so large that they discouraged travel to this region for quite some time. <span />