War of attrition

[Merna]

A war in which forces do not confront each other in direct combat with the [full strength] of their teams, but instead aim to wear each other down over a period of time using tactics such as [guerilla warfare], [sabotage] and other dishonourable means of combat.
The war is a war which will not necessarily be won by superior skill but by patience and skillful resource management.

[Luis Fok]

armed fighting between two or more countries or groups, or a particular example of this: