3 sentences

1. 大兵压境，守军感到巨大的压力。

   dà​bīng yā​jìng, shǒu​jūn gǎn​dào jù​dà de yā​lì.

   With massive forces at the border, the defenders felt immense pressure.

   Source: Dong Chinese Dictionary

2. 他虽然是个普通大兵，但立过不少战功。

   tā suī​rán shì gè pǔ​tōng dà​bīng, dàn lì guo bù​shǎo zhàn​gōng.

   Although he was just an ordinary soldier, he had performed many military feats.

   Source: Dong Chinese Dictionary

3. 那个朝代因为连年的大兵，国力逐渐变得衰弱。

   nà​ge cháo​dài yīn​wèi lián​nián de dà​bīng, guó​lì zhú​jiàn biàn de shuāi​ruò.

   Due to years of constant warfare, that dynasty's national strength gradually weakened.

   Source: Dong Chinese Dictionary