2 sentences

1. 士兵们在操场上列队集合。

   shì​bīng men zài cāo​chǎng shàng liè​duì jí​hé.

   The soldiers lined up on the playground.

   Source: Dong Chinese Dictionary

2. 在庆典仪式上，骑警列队走过广场。

   zài qìng​diǎn yí​shì shàng, qí​jǐng liè​duì zǒu​guò guǎng​chǎng.

   The mounted police paraded across the square during the ceremony.

   Source: Dong Chinese Dictionary