06/13/1917
https://www.presidency.ucsb.edu...
"Therefore, by virtue of the power vested in me under the Constitution and by the Joint Resolution passed by Congress on April 6, 1917, declaring the existence of a state of war, it is ordered that all..."
"To these Departments, respectively, is delegated the duty of preparing and enforcing rules and regulations under this order to accomplish the purpose mentioned"
"It is further declared that the current status of war constitutes an \extraordinary emergency\"
"The cooperation of state, county and municipal civil service commissions with the United States Civil Service Commission is desirable in the existing exigency in meeting the needs of the Federal Gover..."