There are different types of intervention, some more discrete than others:

Observation/monitoring only, for example of Cuban troops leaving Angola or of the Iran-Iraq ceasefire in 1991.

Assisting a country to independence, for example in Namibia 1978— 1989.

Armed intervention, for example in the Suez Canal region 1956—1967 to keep Egypt and Israel apart and supervise the withdrawal of troops from the UK, France and Israel.