4 sentences

1. 游击队在森林里伏击了敌人。

   yóu​jī​duì zài sēn​lín lǐ fú​jī le dí​rén.

   The guerrillas ambushed the enemy in the forest.

   Source: Dong Chinese Dictionary

2. 游击队对敌人的补给线发动了袭击。

   yóu​jī​duì duì dí​rén de bǔ​jǐ​xiàn fā​dòng le xí​jī.

   The guerrillas launched an attack on the enemy's supply lines.

   Source: Dong Chinese Dictionary

3. 这支游击队后来被改编成了正规军。

   zhè zhī yóu​jī​duì hòu​lái bèi gǎi​biān chéng le zhèng​guī​jūn.

   The guerrilla unit was later reorganized into a regular army.

   Source: Dong Chinese Dictionary

4. 爷爷经常给我们讲他当年在游击队打鬼子的故事。

   yé​ye jīng​cháng gěi wǒ​men jiǎng tā dāng​nián zài yóu​jī​duì dǎ guǐ​zi de gù​shi.

   Grandpa often tells us stories about how he fought the 'devils' (invaders) in the guerrilla forces back then.

   Source: Dong Chinese Dictionary