3 sentences

1. 战败后，他被送到邻国为质。

   zhàn​bài hòu, tā bèi sòng dào lín​guó wéi zhì.

   After the defeat, he was sent to a neighboring country as a hostage.

   Source: Dong Chinese Dictionary

2. 那支军队在战争中彻底战败了。

   nà zhī jūn​duì zài zhàn​zhēng zhōng chè​dǐ zhàn​bài le.

   That army was completely defeated in the war.

   Source: Dong Chinese Dictionary

3. 战败的将领向盟军统帅递交了投降状。

   zhàn​bài de jiàng​lǐng xiàng méng​jūn tǒng​shuài dì​jiāo le tóu​xiáng zhuàng.

   The defeated general submitted a letter of surrender to the Allied commander.

   Source: Dong Chinese Dictionary