2 sentences

1. 由于长期缺乏补给，部分士兵在边境发动了叛变。

   yóu​yú cháng​qī quē​fá bǔ​jǐ, bù​fen shì​bīng zài biān​jìng fā​dòng le pàn​biàn.

   Due to a prolonged lack of supplies, some soldiers staged a mutiny at the border.

   Source: Dong Chinese Dictionary

2. 在那场政治危机中，一些高级官员选择叛变投敌。

   zài nà cháng zhèng​zhì wēi​jī zhōng, yī​xiē gāo​jí guān​yuán xuǎn​zé pàn​biàn tóu​dí.

   During that political crisis, some high-ranking officials chose to defect to the enemy.

   Source: Dong Chinese Dictionary