=The Army.=--The Constitution expressly authorizes Congress to raise and support armies, subject to the limitation that no appropriation for the support of the army shall be for a longer period than two years. This period corresponds to the term of Congress, and hence the limitation serves to keep the army under the control of the people. There was more or less jealousy of standing armies at the time of the adoption of the Constitution, and for a long time the regular army of the United States was very small; in 1898, for example, it was only 27,000 men. _Present Strength of the Army._--By an act passed in 1916 provision was made for increasing the peace strength of the regular army to 480,000 men; for establishing officers' reserve training corps at colleges and universities; for maintaining camps for giving military training to citizens who apply for it; and for creating a regular army reserve, the members of which are to receive at least fifteen days' training each year. Provision was also made for reorganizing the militia and for increasing its strength ultimately to about 425,000 men. The expense of the training camps and of equipping, training, and paying a small salary to the officers and men of the organized militia and of the regular army reserve is to be borne by the national government. After the beginning of the war with Germany (1917), provision was made for raising a large army by conscription of able-bodied young men between the ages of 21 and 31 years--later on between 18 and 45.[51] By the act of June 4, 1920, the strength of the regular army was reduced to 150,000 men on October 1, 1921. [51] In 1918 when the World War closed some 2,000,000 Americans were under arms in France and about 2,000,000 were in the training camps and schools in the United States. _The General Staff._--In 1903 the office of "commanding general" was abolished and in its place a general staff was created, to prepare plans for the conduct of military operations. By the acts of 1916 and 1920 the general staff was reorganized. At its head is a chief of staff with the rank of major general, who in time of peace is the actual head of the army. Among his assistants are: a chief of cavalry, a chief of field artillery, a chief of coast artillery, a chief of infantry, and a chief of chaplains.