This Week in World War I September 12-18, 1914
Submarine craft have existed since the 18th century and more primitive versions date back even further. The First World War, however, was the first conflict in which submarines were widely deployed and were they played a major role in shaping both the course and the final outcome of the conflict.
week world war september submarine craft exist century primitive version date world war conflict submarine widely deploy play major role shape co USA  final outcome conflict