The development of the commercial use of the airplane.

The development of new food supplies.

The production of fertilizer from the nitrogen of the air.

The development of new industries in the United States.

Changes in methods of farming.

What are some changes in education that are likely to result from
the war?

Show how the strike of coal miners in 1919 affected the life of
the nation.

THE "SUPREME TEST" OF THE NATION

The "working together" of all these interdependent parts is the
important thing. "The supreme test of the nation has come," said
President Wilson. "We must all speak, act, and serve together."
[Footnote: Message to the American People, April 15, 1919].

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It is not an army that we must shape and train for war ... it is a
Nation. To this end our people must draw close in one compact
front against a common foe. But this cannot be if each man pursues
a private purpose. The Nation needs all men, but it needs each
man, not in the field that will most pleasure him, but in the