3 sentences for 后方 (hòu​fāng — rear area)

1. 许多妇女在后方参与生产支援前线。

   xǔ​duō fù​nǚ zài hòu​fāng cān​yù shēng​chǎn zhī​yuán qián​xiàn.

   Many women participated in production in the rear to support the front.

   Source: Dong Chinese Dictionary

2. 他在激战中不幸中伤，被送往后方医院。

   tā zài jī​zhàn zhōng bù​xìng zhòng​shāng, bèi sòng​wǎng hòu​fāng yī​yuàn.

   He was unfortunately wounded in a fierce battle and sent to a hospital in the rear.

   Source: Dong Chinese Dictionary

3. 趁着对方后方兵力空虚，他们发动了突袭。

   chèn​zhe duì​fāng hòu​fāng bīng​lì kōng​xū, tā​men fā​dòng le tū​xí.

   Taking advantage of the enemy's weak defenses in the rear, they launched a surprise attack.

   Source: Dong Chinese Dictionary