PROVING GROUND • FREE-TRANSLATOR.COM • Definition of Proving ground

... the last-minute guidance which materialized my high school diploma; and the ultimate boon, my living Master from the mist of lifelong dreams. Never could I admit my "philosophy" unequal to any tussle on the world's harsh proving ground! ...

— Autobiography of a YOGI • Paramhansa Yogananda

... integration was desirable, and despite all predictions to the contrary, it was a success. Military commentators in and out of uniform stoutly defended the new system against its few critics.[17-97] Most pointed to Korea as the proving ground for the new policy. Assistant Secretary of Defense Hannah generalized about the change to integration: "Official analyses and reports indicate a definite increase in combat effectiveness in the overseas areas.... From experience in Korea and elsewhere, Army commanders have (p. ...

— Integration of the Armed Forces, 1940-1965 • Morris J. MacGregor Jr.