5 sentences

1. 双方激战良久，始终胜负难决。

   shuāng​fāng jī​zhàn liáng​jiǔ, shǐ​zhōng shèng​fù nán jué.

   The two sides fought fiercely for a long time, but the outcome remained undecided.

   Source: Dong Chinese Dictionary

2. 两军在边境地带展开了激战。

   liǎng jūn zài biān​jìng dì​dài zhǎn​kāi le jī​zhàn.

   The two armies engaged in a fierce battle in the border area.

   Source: Dong Chinese Dictionary

3. 他在激战中不幸中伤，被送往后方医院。

   tā zài jī​zhàn zhōng bù​xìng zhòng​shāng, bèi sòng​wǎng hòu​fāng yī​yuàn.

   He was unfortunately wounded in a fierce battle and sent to a hospital in the rear.

   Source: Dong Chinese Dictionary

4. 起义军经过三天的激战，终于夺取了这座城市。

   qǐ​yì​jūn jīng​guò sān tiān de jī​zhàn, zhōng​yú duó​qǔ le zhè zuò chéng​shì.

   After three days of fierce fighting, the rebel army finally captured the city.

   Source: Dong Chinese Dictionary

5. 经过三天的激战，我军终于攻克了敌方的堡垒。

   jīng​guò sān tiān de jī​zhàn, wǒ jūn zhōng​yú gōng​kè le dí​fāng de bǎo​lěi.

   After three days of fierce fighting, our army finally captured the enemy's stronghold.

   Source: Dong Chinese Dictionary