DEFINITION:

Besides the security applications (most of the time considered as part of defence policy), there are another military uses of the space including the weapon and anti-weapon systems based on space.

But there are civilian applications of space (particularly, observation, navigation and communications) that also have military uses and, most of the times, dedicated space infrastructures due to security reasons.

(Source: PAE own elaboration and NATO Space Operation Assessment: https://www.japcc.org/wp-content/uploads/NATO-Space-Ops-Assessment-Jan-09.pdf )