4 sentences

1. 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

2. 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

3. 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

4. 创业就像是一次漫长的长征，需要坚韧不拔的意志。

   chuàng​yè jiù xiàng​shì yī cì màn​cháng de cháng​zhēng, xū​yào jiān​rèn​bù​bá de yì​zhì.

   Starting a business is like a long march; it requires steadfast willpower.

   Source: Dong Chinese Dictionary