 He acquired United States citizenship in early 1918 with the expectation that his medical history would exempt him from his final year of draft eligibility.So it came as an unpleasant surprise that within months Berlin was drafted and serving as a private at Camp Upton at a salary of $30 a month, far below his usual earnings.Although as a civilian he employed a private valet, as an Army private he was compelled to perform unskilled labor in support of camp operations.