1. **Drones:** (n) Unmanned aerial vehicles that can be operated remotely, often used for various purposes including surveillance, reconnaissance, and military operations.
   - Vietnamese: 'Phi cơ không người lái'
   - Pronunciation: /droʊnz/
   - Example: The military deployed drones to gather information about enemy positions.

2. **Prototype:** (n) An early or preliminary version of a product or system that serves as a model for further development.
   - Vietnamese: 'Nguyên mẫu'
   - Pronunciation: /ˈproʊtəˌtaɪp/
   - Example: The engineers built a prototype of the new aircraft to test its performance.

3. **Aerial Mission:** (n) A task or operation conducted in the air, often involving aircraft.
   - Vietnamese: 'Nhiệm vụ trên không'
   - Pronunciation: /ˈɛəriəl ˈmɪʃən/
   - Example: The pilots prepared for their aerial mission to survey the disaster area.

4. **Attack:** (n) A deliberate and aggressive act aimed at causing harm, damage, or destruction.
   - Vietnamese: 'Cuộc tấn công'
   - Pronunciation: /əˈtæk/
   - Example: The surprise attack caught the enemy forces off guard.

5. **Military Base:** (n) A facility used by the armed forces for training, operations, and storage of equipment and supplies.
   - Vietnamese: 'Cơ sở quân sự'
   - Pronunciation: /ˈmɪləˌtɛri beɪs/
   - Example: The military base was heavily fortified to withstand potential threats.

6. **Crimea:** (n) A peninsula located on the northern coast of the Black Sea, with political and territorial significance between Ukraine and Russia.
   - Vietnamese: 'Bán đảo Crimea'
   - Pronunciation: /kraɪˈmiə/
   - Example: The conflict in Crimea led to international tensions and disputes.

7. **Swarm:** (n) A large group of things, often insects or animals, moving together in a coordinated way.
   - Vietnamese: 'Đàn, bầy'
   - Pronunciation: /swɔrm/
   - Example: A swarm of bees gathered around the hive.

8. **Experimental:** (adj) Involving new ideas, methods, or techniques that are not yet proven or established.
   - Vietnamese: 'Thử nghiệm'
   - Pronunciation: /ɪkˌspɛrɪˈmɛntəl/
   - Example: The researchers conducted an experimental study to test the effects of the new drug.

9. **Explosions:** (n) Violent bursts or releases of energy, often accompanied by a loud noise and forceful movement.
   - Vietnamese: 'Vụ nổ'
   - Pronunciation: /ɪkˈspləʊʒənz/
   - Example: The explosions were heard across the city after the factory caught fire.

10. **Casualties:** (n) People who are killed, wounded, or injured as a result of an accident, disaster, or conflict.
    - Vietnamese: 'Thương vong'
    - Pronunciation: /ˈkæʒuəltiz/
    - Example: The war resulted in a high number of casualties on both sides.

11. **Development:** (n) The process of growth, advancement, or progress, especially in terms of technology or infrastructure.
    - Vietnamese: 'Sự phát triển'
    - Pronunciation: /dɪˈvɛləpmənt/
    - Example: The rapid development of the city led to improved living standards.

12. **Fixed-Wing:** (adj) Referring to aircraft with wings that are rigidly attached to the fuselage and do not rotate.
    - Vietnamese: 'Máy bay cánh cố định'
    - Pronunciation: /fɪkst wɪŋ/
    - Example: The fixed-wing aircraft soared through the sky with grace.

13. **Kamikaze:** (adj) Referring to a type of attack or action where the person carrying it out is willing to sacrifice their life in the process.
    - Vietnamese: 'Tấn công Kamikaze'
    - Pronunciation: /ˌkɑːmɪˈkɑːzi/
    - Example: The kamikaze pilots carried out suicide missions during World War II.

14. **Payload:** (n) The cargo or equipment that an aircraft, spacecraft, or missile carries.
    - Vietnamese: 'Hàng hóa, thiết bị chở theo'
    - Pronunciation: /ˈpeɪˌloʊd/
    - Example: The rocket's payload included communication satellites.

15. **Necessity:** (n) A situation in which something is required or indispensable.
    - Vietnamese: 'Sự cần thiết'
    - Pronunciation: /nəˈsɛsəti/
    - Example: The urgency of the situation made immediate action a necessity.

16. **Counter-Offensive:** (n) A military action taken to counterattack and regain lost ground or initiative.
    - Vietnamese: 'Phản công'
    - Pronunciation: /ˈkaʊntər əˈfɛnsɪv/
    - Example: The successful counter-offensive pushed back the enemy forces.

17. **Logistics:** (n) The detailed organization and implementation of a complex operation, often involving the movement and supply of resources.
    - Vietnamese: 'Quản lý vận chuyển, hậu cần'
    - Pronunciation: /ləˈdʒɪstɪks/
    - Example: The logistics of coordinating a large-scale event can be challenging.

18. **Intelligence:** (n) Information gathered through observation, investigation, or surveillance, often used in military or strategic contexts.
    - Vietnamese: 'Tình báo'
    - Pronunciation: /ɪnˈtɛlɪdʒəns/
    - Example: The intelligence agency provided crucial information about the enemy's plans.

19. **Algorithms:** (n) Step-by-step procedures or instructions for solving a problem or performing a task, often used in computing and data analysis.
    - Vietnamese: 'Thuật toán'
    - Pronunciation: /ˈælɡəˌrɪðəmz/
    - Example: The algorithm efficiently sorted the data based on various criteria.

20. **Electronic Warfare:** (n) Military actions that involve the use of electronic systems to disrupt or deceive enemy communications, radar, and other systems.
    - Vietnamese: 'Chiến thuật điện tử'
    - Pronunciation: /ɪlɛkˈtrɒnɪk ˈwɔrˌfɛr/
    - Example: Electronic warfare played a crucial role in disrupting the enemy