Identify Canada's role in land, air and naval war in WWI

As events soon proved, Canadians excelled in aerial combat. In providing many members of the Royal Flying Corps, the Royal Naval Air Service and later the Royal Air Force, Canada made a great contribution in this field. More than 23,000 Canadian airmen served with British Forces and over 1,500 died.

Explanation:

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean