6 sentences

1. 红军翻过了大雪山。

   Hóng​jūn fān​guò le dà xuě​shān.

   The Red Army crossed the Great Snow Mountains.

   Source: Dong Chinese Dictionary

2. 红军在这一带建立了根据地。

   Hóng​jūn zài zhè yī​dài jiàn​lì le gēn​jù​dì.

   The Red Army established a revolutionary base in this area.

   Source: Dong Chinese Dictionary

3. 中国红军开始了举世闻名的长征。

   Zhōng​guó Hóng​jūn kāi​shǐ le jǔ​shì​wén​míng de cháng​zhēng.

   The Chinese Red Army began the world-renowned Long March.

   Source: Dong Chinese Dictionary

4. 红军长征是世界军事史上的奇迹。

   Hóng​jūn cháng​zhēng shì shì​jiè jūn​shì​shǐ shàng de qí​jì.

   The Red Army's Long March is a miracle in world military history.

   Source: Dong Chinese Dictionary

5. 在历史课上，老师详细地讲解了红军长征的那段历史。

   zài lì​shǐ kè shàng, lǎo​shī xiáng​xì de jiǎng​jiě le Hóng​jūn cháng​zhēng de nà duàn lì​shǐ.

   In history class, the teacher gave a detailed explanation of the Red Army's Long March.

   Source: Dong Chinese Dictionary

6. 苏联红军在二战中立下了汗马功劳。

   Sū​lián Hóng​jūn zài èr​zhàn zhōng lì​xià le hàn​mǎ​gōng​láo.

   The Soviet Red Army performed great feats in World War II.

   Source: Dong Chinese Dictionary