The title of the "best army in the world" can depend on various criteria such as size, budget, technology, training, and overall effectiveness. Some of the world's top military forces include:
- United States: The U.S. military is considered the most powerful in the world due to its massive defense budget, advanced technology, and global presence. It has unmatched air, naval, and ground forces, including cutting-edge weapons systems, drones, and a nuclear arsenal.

- 2. Russia: Russia has a large, well-equipped military with significant nuclear capabilities. It focuses heavily on its land forces and has a strong air defense system, making it one of the most formidable armies in terms of sheer force.

- 3. China: The People's Liberation Army (PLA) is the world's largest standing military force in terms of personnel. China is rapidly modernizing its military with advanced technology, including stealth fighters, missiles, and a growing naval fleet.

- 4. India: India has the second-largest active military personnel and is expanding its defense capabilities, especially in air and naval power. Its army is known for its experience in high-altitude warfare and counterinsurgency operations.

- 5. United Kingdom: The British Army is known for its high level of training, advanced equipment, and global reach, despite being smaller than other major powers. The UK's navy and special forces, such as the SAS, are particularly well-regarded.

- 6. France: France has a highly capable military, known for its rapid deployment capabilities and strong air and naval forces. Its involvement in NATO and various peacekeeping missions also contributes to its global military reputation.

- 7. Israel: The Israel Defense Forces (IDF) are renowned for their advanced technology, intelligence capabilities, and experience in modern warfare, particularly in counterterrorism and asymmetric warfare.

These rankings can shift based on military strategies, geopolitical developments, and advancements in defense technology.