The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. ... This assassination led to Austria-Hungary declaring war on Serbia.
Answer:
There were a couple of reasons for moving to the southern colonies. The first would be that they were loosing in the North and wanted to try and pierce the South to get ports and some ground to wage war.
They also believed that many slaves would embrace their liberation and join their cause against their former masters.
If they captured the South ports they could transport troops and equipment a lot quicker and easier from the British West Indies.
And they thought that there were more loyalists in the South and that would mean more domestic manpower for holding the lines.
The 18th amendment deals with alcohol
The American soldiers were rested and brought energy to the Allies. The spirit of the Allied soldiers improved significantly. Unites States industries produced much-needed supplies for the Allies. Military equipment and food were provided to assist the Allies in their fight against the Central Powers.
The Atlantic Slave Trade, hope this helps