What are the poems that describe "frontier defense is very important"?

1.

In Tang Dynasty, Yang Ping

Jiuyuan was near the water, and his feet were heavy cities. I am only a Confucian old man, and I am sympathetic to riding. ?

the fine clumps of elms are filled with water, and the high points are clear with wild mountains. The Lord scoffed at the Han people, and he had no intention to restrain himself.

2.

Tang dynasty: Wang Wei

wanted to ask about the border by bicycle, which belonged to the country.

collect the wild goose from Hansai and return it to Hu Tian.

the desert is lonely and straight, and the long river sets the yen.

Xiao Guan is always riding in Yanran.

3.

Two Poems of Liangzhou

Tang Dynasty: William Wang

Glowing glass of grape wine. If you want to drink pipa, you should be urged immediately.

You don't laugh when you're drunk on the battlefield. How many times have you fought in ancient times?

4.

Tang Dynasty: Wang Changling

During the Qin Dynasty, the moon was closed in the Han Dynasty, but the people of the Long March were not returned.

But make the Dragon City fly, and don't teach Huma to cross the Yinshan Mountain.

5.

Two Poems of Liangzhou, Part One

Tang Dynasty: Wang Zhihuan

The Yellow River is far above the white clouds, and it is a lonely city of Wan Ren Mountain.

why should Qiangdi blame the willow? The spring breeze doesn't pass Yumenguan.