The world's three largest employers are:

1. India's Ministry of Defense (2.99M people)

2. The U.S. Department of Defense (2.91M people)

3. China's People's Liberation Army (2.55M people)

(As of 2022)

(Note: China's Central Military Commission, which includes civilian positions, may be #1 at 6.8M, but records aren't reliable.)

https://www.statista.com/chart/3585/the-worlds-biggest-employers/