6 sentences

1. 他在瞭望塔上观察敌情。

   tā zài liào wàng​tǎ shàng guān​chá dí​qíng.

   He is observing enemy movements from the watchtower.

   Source: Dong Chinese Dictionary

2. 守军站在城壁上观察敌情。

   shǒu​jūn zhàn zài chéng bì shàng guān​chá dí​qíng.

   The defenders stood on the city walls to observe the enemy situation.

   Source: Dong Chinese Dictionary

3. 士兵们伏在草丛里观察敌情。

   shì​bīng men fú zài cǎo​cóng lǐ guān​chá dí​qíng.

   The soldiers lay hidden in the grass to observe the enemy.

   Source: Dong Chinese Dictionary

4. 侦察兵向指挥部发电报告敌情。

   zhēn​chá​bīng xiàng zhǐ​huī​bù fā​diàn bào​gào dí​qíng.

   The scout sent a telegram to headquarters to report the enemy's situation.

   Source: Dong Chinese Dictionary

5. 探子已经回来向将军回报敌情了。

   tàn​zi yǐ​jīng huí​lai xiàng jiāng​jūn huí​bào dí​qíng le.

   The scout has returned to report on the enemy's situation to the general.

   Source: Dong Chinese Dictionary

6. 通信连的战士正在树林里隐蔽，秘密侦听敌情。

   tōng​xìn lián de zhàn​shì zhèng​zài shù​lín lǐ yǐn​bì, mì​mì zhēn tīng dí​qíng.

   The soldiers from the communications company are hiding in the woods, secretly monitoring enemy movements.

   Source: Dong Chinese Dictionary