4 sentences

1. 抗日战争期间，日军侵略了中国。

   Kàng Rì Zhàn​zhēng qī​jiān, Rì​jūn qīn​lüè le Zhōng​guó.

   During the War of Resistance Against Japanese Aggression, the Japanese army invaded China.

   Source: Dong Chinese Dictionary

2. 抗日战争对中国历史产生了深远的影响。

   Kàng Rì Zhàn​zhēng duì Zhōng​guó lì​shǐ chǎn​shēng le shēn​yuǎn de yǐng​xiǎng.

   The War of Resistance against Japanese Aggression had a profound impact on Chinese history.

   Source: Dong Chinese Dictionary

3. 抗日战争时期，伪军协助侵略者镇压当地百姓。

   Kàng Rì Zhàn​zhēng shí​qī, wěi​jūn xié​zhù qīn​lüè​zhě zhèn​yā dāng​dì bǎi​xìng.

   During the War of Resistance Against Japanese Aggression, puppet troops assisted the invaders in suppressing the local people.

   Source: Dong Chinese Dictionary

4. 抗日战争期间，八路军在华北建立了许多根据地。

   Kàng Rì Zhàn​zhēng qī​jiān, Bā​lù​jūn zài Huá​běi jiàn​lì le xǔ​duō gēn​jù​dì.

   During the War of Resistance against Japanese Aggression, the Eighth Route Army established many base areas in North China.

   Source: Dong Chinese Dictionary