Abstract: The article focuses on the role of A. E. Evert, the commander-in-chief of the armies of the Western Front, in the events of the February Revolution. Russia's top military leadership took a consolidated position on the abdication of Tsar Nicholas II from the throne, but the unity regarding the fate of the Empire's future was only an appearance. This is made clear through a detailed examination of the decisions made by Evert during the last crucial days for the Russian Empire and of his motives. The author pays particular attention to the period after the emperor’s abdication when, in the political vacuum, the commander-in-chief of the armies of the Western Front changed his line of conduct and proposed the bold project of transferring the country's real political power under military control. The methodological basis of this study is the principles of historicism, systematicity and scientific objectivity, while also using the comparative and historical-genetic methods. 
Evert considered the constitutional monarchy with Mikhail Alexandrovich on the throne as a worthy alternative to the forceful suppression of the revolution in the rear, which cannot be said about his view on the Provisional Government and the prospect of elections to the Constituent Assembly during the war. In this regard, the commander-in-chief of the armies of the Western Front hoped, with the support of his colleagues, to impose his will on the rebellious capital. However, his project did not receive the necessary support, and his disloyalty to the Provisional Government led to his early resignation.

Abstract: The subject of this research is the set of actions taken by command group of the Western front of the Russian Army as a defense against chemical warfare during the World War I. The author thoroughly examines such aspects of the topic as the supply of military staff with the personal chemical gear, training on how to use those, creation of the system of meteorological observation; as well as analyzes the combination of orders and instructions that regulated chemical defense on the front line. Special attention is given to cooperation of the various military administration bodies involved in the sphere of chemical defense. In the course of this research, the author applies systemic approach, method of systemic reconstruction, as well as follows the principles of historicism, scientific objectivity and verifiability. The conclusion is made that the Western front command group has done everything possible to minimize casualties in the conditions of chemical warfare by supplying the crew with the personal protection gear. The Western front used the Zelinsky-Kummant gas mask; as well as organized training of the crew by deploying mobile detachments. The established system also has a number of flaws, but yet allowed familiarizing the soldiers with the basics of defense against the new type of weapon. At the same time, some fatal mistakes were made in organization of the chemical defense. The front staff neglected the questions of chemical reconnaissance and gas warning, therefore, the corps and army command groups had to rectify such deficiencies, often at the cost of harrowing experience.