The war between Tang Dynasty and Japan is one of the important events in the history of China and Japan. This war took place at the end of the Tang Dynasty and lasted for several years, bringing profound impacts on the politics, economy and culture of both countries.

First, let's review the historical backgrounds of Tang Dynasty and Japan. Tang Dynasty was one of the most glorious periods in Chinese history, with vast territory and strong national strength, exerting strong influence on neighboring countries. Japan, located in the southeast of China's sea area, was a small island country that maintained close contacts with China. During the Tang Dynasty, Japan had paid tribute to China many times and traded with China.

However, as the politics of Tang Dynasty became corrupt and social unrest intensified, Japan began to rise gradually. In 710 AD, Japan dispatched an army to the Korean Peninsula, attempting to expand its influence in the region. Tang Dynasty took a tough stance and sent a large army to suppress the Japanese forces in the Korean Peninsula. This marked the outbreak of the war between Tang Dynasty and Japan.

In the following years, both sides engaged in several battles. Tang Dynasty was led by An Lushan, while Japan was controlled by the Ping family. The outcome of the war was inconclusive, with both sides suffering certain losses. However, the internal problems of Tang Dynasty gradually worsened, making it unable to continue fighting against Japan. In 754 AD, Tang Dynasty was forced to sign the "Song of Everlasting Sorrow" treaty, recognizing Japan's sovereignty over the Korean Peninsula and paying a large amount of reparations to Japan.

This war had profound impacts on both Tang Dynasty and Japan. For Tang Dynasty, the war further declined its national strength, and political corruption and social unrest intensified. For Japan, the war provided opportunities for its expansion and made it a powerful country. In addition, the war also promoted cultural exchanges between China and Japan, laying the foundation for the development of relations between the two countries.

In conclusion, the war between Tang Dynasty and Japan is an important event in history. It not only affected the political, economic and cultural conditions at that time, but also had profound impacts on the relations between China and Japan. We should seriously study this history, learn from it, and promote the development of relations between the two countries.

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