"The german term meaning undersea boat". Most effective in a economic warfare role and enforcing a naval blockade against the enemy shipping.

Convoy System

A group of merchantmen or troopships travelling together with a naval escort. They defeated the German Submarine Campaign. The Germans were unable to meet their quota for sinking ships in 1917.

John J. Pershing

He led the American Expenditionary Forces in WWI. Nickname (Black Jack). Only person in his lifetime to achieve the highest rank ever held in the United States Army. He holds the United States Army in Europe during WWII.

Trench Warfare

The most prominent case of trench warfare is the Western Front. It has become a byword for stalemate, attrition and futility in conflict.It is a form of land warfare using occupied fighting lines consisting largely of trenches, in which troops are significantly protected from the enemy's small arms fire and are substantially sheltered from artillery.

American Expeditionary Force

They were the United States Armed Forces sent to Europe in World War I. They fought along French and British allied forces. They played a major role in WWI.

"No Man's Land"

It is described as describe the area of land between two enemy trench systems to which neither side wished to move openly or to seize due to fear of being attacked by the enemy in the process.