Final answer:
True. Japan's occupation of Manchuria in 1931 and creation of the puppet state of Manchukuo led to an international backlash and condemnation by the League of Nations, but resulted in no effective intervention.
Step-by-step explanation:
It is true that Japan saw major backlash from the international community when they attached the province of Manchuria. The incident, known as the Manchurian Crisis, began with a pretext for invasion created by Japan and resulted in the occupation of Manchuria and the establishment of the puppet state of Manchukuo. The international community, led by the League of Nations, protested Japan's seizure of Chinese territory in 1931 and 1932. Following the publication of the Lytton Report which criticized Japan's actions, Japan withdrew from the League in March 1933. Despite the protests, there was no effective intervention to assist China or to reverse Japan's actions, illustrating the limitations of the international bodies of the time.