I want to know the answer to the following question:
What is the river that the 40th, 3rd, and 6th Japanese divisions tried crossing to reach Changsha?
All the background I'm provided with is that "Although the Japanese army initially successfully captured the city, the Chinese 57th division was able to pin them down long enough for reinforcements to arrive and encircle the Japanese.". Is that enough to answer the question?
Answer: no