Answer
World War I, the global conflict that lasted from 1914 to 1918, coincided with the adolescence of Sergei Yesenin. During this period of his life, Yesenin was greatly influenced by the tumultuous events unfolding around him, which found their way into his poetic works. The war deeply impacted Russian society, shaping Yesenin's worldview and contributing to Themes of his early poetry.