In August 1905, key figures within the Chinese revolutionary movement gathered in Tokyo, Japan, to establish the Tongmenghui, officially known as the 'United League'. Led by Sun Yat-sen and alongside prominent individuals such as Song Jiaoren, the organization aimed to galvanize the efforts of like-minded Chinese nationalists in their shared goal of overthrowing the Qing dynasty. The meeting sought to unify various factions of revolutionaries scattered across China and abroad, emphasizing the necessity of collaboration in their struggle for a republican government.

The choice of Tokyo as a meeting place was strategic. Japan, having undergone rapid modernization and emerged victorious in the Russo-Japanese War, served as an inspiring backdrop for Chinese republicans seeking reform. The participants engaged in discussions that highlighted the importance of collaboration and the need to prioritize the establishment of a democratic society in China. This momentous assembly laid the groundwork for an organized revolutionary effort that would ultimately lead to significant political changes in China over the following years.

The Tongmenghui attracted various supporters, including students, intellectuals, and expatriates, who were inspired by the ideals of democracy and nationalism. By uniting different factions and resources, the organization bolstered the revolutionary movement, catalyzing action against the ruling Qing government. The establishment of the Tongmenghui marked a crucial turning point in Chinese political history, fostering a spirit of rebellion that would come to fruition during the 1911 Revolution. As the movement gained momentum, it set the stage for transforming China from an imperial dynasty into a republic.