Group 1 - The establishment of a broad anti-Japanese national united front was a significant political proposition by the Chinese Communist Party (CCP) during the Anti-Japanese War, rooted in its Marxist political attributes and aimed at defeating Japanese imperialism [2][3] - The CCP recognized that mobilizing the broadest masses of people was essential to resist foreign aggression and save the nation, emphasizing the decisive role of the people in historical development [2][4] - The CCP's advocacy for the anti-Japanese national united front was a response to the deepening national crisis after the September 18 Incident, which allowed the party to gain widespread support from various ethnic and social groups [3][5] Group 2 - The success of the Anti-Japanese War depended on the broad mobilization of the entire nation, as the CCP highlighted that without relying on the masses, victory would be impossible [4][6] - The CCP was not only an advocate but also an outstanding organizer and practitioner of the anti-Japanese national united front, consistently opposing surrender and promoting unity [5][6] - The CCP's efforts included calling for the cessation of civil war and the establishment of the united front, which was crucial for rallying various parties and groups against Japanese aggression [5][7] Group 3 - The CCP effectively navigated the complex international and domestic situations during the war, ensuring the smooth establishment and continuous development of the anti-Japanese national united front [8][9] - The party maintained its leadership role and independence within the united front, emphasizing the importance of its political line and the absolute leadership over the military forces [9][10] - The CCP's strategies included developing progressive forces, engaging middle forces, and isolating stubborn elements, which maximized the unity and effectiveness of the anti-Japanese efforts [10]