This paper quantifies the impact of the Vietnam War on fertility rates in the late 1960s and early 1970s. For draft-eligible men wishing to avoid military service, the hardship deferment (III-A) for paternity created a powerful incentive to father a child. We provide a time series suggesting that the risk of being drafted and the availability of the paternity deferments significantly increased US fertility rates, especially among childless women likely to be partnered with draft-eligible men. Our results suggest caution in attributing the decline in fertility after 1970 solely to the legalization of abortion.