Here is a concise summary of the provided text:
**Title:** The Battle of Rạch Gầm - Xoài Mút
**Setting:** Mekong Delta, late 1784 to early 1785
**Context:** The Tây Sơn dynasty, led by Nguyễn Huệ, defends against a 50,000-strong Siamese invasion force, allied with the weakening Lord Nguyễn and Nguyễn Ánh.
**Key Events:**
1. Nguyễn Huệ sets a trap for the Siamese at Rạch Gầm - Xoài Mút, utilizing the river's geography to his advantage.
2. The Tây Sơn forces launch a surprise attack, employing naval and land forces, canons, and flame throwers.
3. Nguyễn Huệ engages in personal combat, defeating key Siamese generals Chiêu Tăng and Chiêu Sương.
4. Other Tây Sơn generals, including Bùi Thị Xuân, pursue and defeat additional Siamese leaders, such as Lục Côn.
**Outcome:**
* The Siamese suffer a crushing defeat, losing over 300 warships and 40,000 soldiers (four-fifths of their force).
* The victory solidifies the Tây Sơn dynasty's southern front and cements Nguyễn Huệ's legendary status as a brilliant and fearless military leader.
Here are the key facts extracted from the text, each with a number and in short sentences:
**Historical Context**
1. The XVIII century saw the realm at stake with the decline of the courts of King Lê (North) and Lord Nguyễn (South).
2. Imperial court disarray and greedy officials led to frequent uprisings by impoverished peasants.
**Key Figures and Events**
3. Nguyễn Huệ, a brilliant Warrior God, emerged as a leader in the history of the country of the Việt.
4. Rama I of Siam sent a combined force to Gia Định at the end of 1784, per request of Châu Văn Tiếp and Nguyễn Ánh.
5. Grand Admiral Châu Văn Tiếp was killed in a Tây Sơn ambush on the river Măng Thít.
**The Battle of Rạch Gầm - Xoài Mút**
6. The battle took place around midnight on January 19, 1785, near the river Tiền.
7. The Siamese force consisted of approximately 50,000 soldiers and 300 ships.
8. Nguyễn Huệ chose the 7 km long Rạch Gầm - Xoài Mút section of the river as the battlefield.
9. The Tây Sơn army utilized the river's geography, including the islet of Thới Sơn, to their advantage.
10. The battle involved a combination of naval and land forces, with flame throwers and cannons.
11. Prince-consort Trương Văn Đa and Nguyễn Huệ engaged in combat with Siamese generals Chiêu Tăng and Chiêu Sương.
12. Lady General Bùi Thị Xuân led a pursuit, resulting in the death of Lục Côn.
**Aftermath**
13. Over 300 warships and 50,000 Siamese soldiers were defeated by the Tây Sơn army.
14. Chiêu Tăng and Chiêu Sương fled with approximately 10,000 remaining soldiers.
15. The enemy lost four-fifths of their force.
16. The battle of Rạch Gầm - Xoài Mút stabilized the southern front for Tây Sơn.