Final answer:
Grenadiers were special soldiers who threw grenades and were often found moving close to the enemy lines to use their weapons effectively. Their strategy involved deep penetration into enemy territory and readiness to fight to the death in desperate situations, reflecting tactical principles found in Sun Tzu's references.
Step-by-step explanation:
In historical military formations, a grenadier was a specialized soldier who was responsible for throwing grenades and sometimes also for handling assault operations. The role of grenadiers has evolved over time, and during different periods and in various armies, they might play distinct roles. However, traditionally, grenadiers would often be found moving close to the enemy, in an effort to toss their grenades effectively during an assault. This would typically involve maneuvering close to enemy fortifications or troops. Additionally, given the context of Sun Tzu's thoughts in the provided references, it is suggested that soldiers, such as grenadiers, would form part of a cohesive force when penetrating enemy lines deeply, and that they would be prepared to face death when in desperate situations or when on "desperate ground" as Sun Tzu suggests.