Which countries in the world have compulsory military service, which are voluntary military service, which are combined military service and which are others?

The military service system in the world can be roughly divided into three categories according to the way and nature of conscription: compulsory military service, voluntary military service and mixed military service.

The following are the military service systems in some countries:

1. Compulsory military service system: Israel, North Korea and other countries implement compulsory military service system, requiring their citizens to perform military service obligations for a certain period of time within a certain age, and the soldiers after serving are listed as reserve.

2. Voluntary military service system: the United States, Britain, France, Belgium, the Netherlands, Ireland, Portugal, Italy, Hungary, Romania and other countries implement voluntary military service system, that is, citizens voluntarily join the army and sign contracts.

3. Mixed military service system: Germany, Greece, Denmark, Sweden, Norway, Finland, Poland, Turkey, Belarus and other countries implement mixed military service system, that is, compulsory military service system and contract military service system are combined.

It should be noted that the military service system in different countries may be different and may be adjusted with the change of time and political environment.