EN
The purpose of this article is to present the basic determinants as regards the use of the Territorial Defence Force (TDF) in the national defence system. The article focuses on issues related to security and defence as well as their impact on national security, and indicates the need to establish territorial forces in order to increase military potential in any country. What is more, it describes basic tasks which TDF can perform during individual stages of armed operations. Particular attention is paid to the fulfilment of the tasks by TDF as regards purely army-related activities, both military and non-military. It is indicated that TDF is a military formation that fills the gap as regards the security of a given area or territory, and that it can supplement the operational forces, thus constituting a vital element of the national defence system.