The town was defended by a large army. ✬

Our army broke through the enemy defenses. ✬

If he could pass for eighteen years old, he'd join the army. ✬

The army abandoned the town to the enemy. ✬

The army had to retreat. ✬

The army advanced up the hill. ✬

The army advanced on the enemy. ✬

I went into the army. ✬

A great number of citizens went into the army. ✬

He was drafted into the army. ✬