前沿 (qián yán): (military) forward position; frontier; cutting-edge; forefront

The soldiers received orders to reach the forward position before dawn to prepare for the enemy's attack.

Risking their lives, the journalist went deep into the forward position to report the most authentic situation of the war.

The general personally came to the forward position to inspect and boost the soldiers' morale.

During the war, the forward medical station was often attacked by artillery fire, but the medical staff still held their posts.