He stopped being a student at the beginning of World War I.

There were 1,260 in service at the beginning of World War I.

With the beginning of World War I, planning was put on hold until 1919.

After the beginning of World War I, development completely stopped.

Its influence was felt there right up until the beginning of World War I.

It was in operation until the beginning of World War I.

The drilling continued until the beginning of World War I.

The tournament stopped due to the beginning of World War I in 1914.

At the beginning of World War I, with more than 15,000 employees, production output was 4,000 weapons per day.

By the beginning of World War I, though, habits had begun changing.