3 sentences for 乱 (luàn — upheaval)

1. 他到处点火，唯恐天下不乱。

   tā dào​chù diǎn​huǒ, wéi​kǒng tiān​xià bù luàn.

   He stirs up trouble everywhere, as if he wants to see the world in chaos.

   Source: Dong Chinese Dictionary

2. 战争之后，那个国家陷入了大乱。

   zhàn​zhēng zhī​hòu, nà gè guó​jiā xiàn​rù le dà luàn.

   After the war, that country fell into great chaos.

   Source: Dong Chinese Dictionary

3. 他总是四处放火，唯恐天下不乱。

   tā zǒng​shì sì​chù fàng​huǒ, wéi​kǒng tiān​xià bù luàn.

   He is always stirring up trouble, fearing nothing more than peace.

   Source: Dong Chinese Dictionary