What are the differences between Binh (兵), Dũng (勇), Tốt (卒), and Đinh (Đinh)?

When watching Chinese historical dramas, you have likely seen soldiers with characters like 兵, 勇, or 卒 printed on the chest of their uniforms. You may also have seen scenes where officials seize "civilian males" (民丁 - dân đinh) for forced labor. While all four terms relate to soldiers in feudal China, their essence, status, and duties are entirely different.

1️⃣ 兵 (Binh) – Regular Army, State Soldiers
These were the mainstay forces and the standing army of the imperial court. They were on the official state "payroll," receiving salaries, weapons, and long-term provisions from the government. A prime example is the Eight Banners and the Green Standard Army of the Qing Dynasty; their uniforms typically featured the character "Binh" (兵) on both the front and back.
The ancient form of the character 兵 (Oracle Bone Script) depicts two hands holding a weapon (like an axe). Originally, the word referred to the weapon itself, but it later became a metonym for the person carrying the weapon to protect the country.

2️⃣ 勇 (Dũng) – Seasonal/Irregular Troops
These were temporarily recruited soldiers or local armed forces. When war broke out and the regular army (Binh) was insufficient or ineffective, the court would recruit civilians from local areas to form units (known as "Hương dũng" or local braves). These troops wore the character "Dũng" (勇). In principle, once the conflict ended, these units were disbanded and did not receive the long-term benefits or salaries of the regular army.

3️⃣ 卒 (Tốt) – Sentries, Low-level Guards, or Servants
This term usually refers to guards at government offices (yamens), manors, or mountain passes, as well as prison guards (ngục tốt) or station sentries. The status of a "Tốt" was generally lower than a "Binh"; their roles were more focused on service and sentry duty rather than participating in major pitched battles.
In Xiangqi (Chinese Chess), the "Tốt" (Pawn) is the smallest piece, only able to move forward one step at a time and never backward. This accurately reflects the nature of the lowest-level vanguard infantry of old, who were often pushed to the front lines as "cannon fodder."

4️⃣ 丁 (Đinh) – Civilians Impressed into Service
"Đinh" refers to adult males (tráng đinh). The character "Đinh" itself did not originally mean "soldier," but rather a male civilian registered for census purposes. During wartime, when the court ordered conscription or forced labor, these men were pulled into the military and called "tráng đinh" (壮丁) or "binh đinh" (兵丁). They were forced to perform military service or corvée labor (such as building walls, carrying supplies, or digging trenches) without having undergone any formal training.

💢 Summary by Professionalism and Status:

• Binh (兵): The "golden boys" of the regular army; permanent personnel.
   
• Dũng (勇): Seasonal "contract" soldiers; disbanded after the fight.
   
• Tốt (卒): Low-level sentries, guards, and runners.
   
• Đinh (丁): Civilians forced into military or manual labor.