3 sentences

1. 由于利益冲突，双方大动干戈。

   yóu​yú lì​yì chōng​tū, shuāng​fāng dà​dòng​gān​gē.

   Due to a conflict of interest, both sides went to war.

   Source: Dong Chinese Dictionary

2. 这次祸端是由他们之间的利益冲突引起的。

   zhè cì huò​duān shì yóu tā​men zhī​jiān de lì​yì chōng​tū yǐn​qǐ de.

   The source of this trouble was the conflict of interest between them.

   Source: Dong Chinese Dictionary

3. 这种机制有助于调节社会各阶层的利益冲突。

   zhè zhǒng jī​zhì yǒu​zhù​yú tiáo​jié shè​huì gè jiē​céng de lì​yì chōng​tū.

   This mechanism helps reconcile conflicts of interest between different social strata.

   Source: Dong Chinese Dictionary