How does Wang Changling's "Out of the Fortress" combine history with the reality of the Tang Dynasty?

In Wang Changling's poem "Crossing the Fortress", he first used the Xiongnu of the Qin and Han Dynasties to correspond to the border wars of the Tang Dynasty, and then used the famous Han Dynasty general Li Guanglai to ironize that the Tang Dynasty did not have good generals at that time, and finally Use the sentence "Don't teach Huma to cross the Yinshan Mountains" to express the desire for the war to stop.

First of all, let’s talk about the first two sentences in "Crossing the Fortress"? The moon was bright in the Qin Dynasty and the Han Dynasty was closed, and the people of the long march of thousands of miles have not returned? The meaning of these two poems is: Since the Qin and Han Dynasties, the bright moonlight has been The border areas of the country have always been shining brightly, and the soldiers who are thousands of miles away from home have never had the opportunity to retire and return home. This sentence is actually talking about the border situation during the Tang Dynasty. Although it was in the heyday of the Tang Dynasty, soldiers still needed to guard the border areas to ensure the peace of the Tang Dynasty. Generations of soldiers were stationed at the border fortress. Spent his life under the moonlight. In addition, Wang Changling himself was at the frontier at that time, so he also used these two poems to express his helplessness and melancholy about not knowing when he would be able to return home.

Secondly, let’s talk about the poem “But the Flying General of Dragon City is here” in “Crossing the Fortress”. The meaning of this poem is: It would be great if General Li Guang from the Han Dynasty was guarding the border. Although the Tang Dynasty at that time said that the Xiongnu, Turks and other forces at the frontier did not dare to act recklessly, and the Tang Dynasty's military strength was also very strong at the time, Wang Changling still believed that the Tang Dynasty lacked powerful generals at that time, so he said this It is also hoped that the Tang Dynasty can cultivate a general who can rival Li Guang, Lian Po, and Huo Qubing in the future.

Finally, the last sentence of "Crossing the Fortress"? "If you don't teach Huma to cross the Yin Mountains?", the meaning of this poem is: The enemy will not be allowed to successfully cross the Yin Mountains. In fact, Wang Changling's poem has two meanings. The first meaning is self-confidence, because the Tang Dynasty was strong at the time and the border was relatively peaceful. The second meaning is the hope that there will be no more wars on the border and that all forces can be peaceful*** Only in this way can the soldiers guarding the border return to their hometowns.