Аннотация:To solve the problem of estimating the number of armed groups in local conflicts was used the experience of the First World War.The hypothesis of similarity of recruiting cohorts, based on statistics which recruits in Germany in 1914 derived patterns and tested for statistical France 1914.Since the difference was not more than 8 %, the conclusion about the real likeness of the number of recruiting cohorts.On the basis of the principle of the resulting number is calculated militarily trained reserves of member countries of the First World War, also coincided with the known data.