Ukraine can be characterised by separate tendencies that have to be taken into consideration while planning the measures for detection, prevention, and overcoming of threats to the national security of the Republic of Latvia. Firstly, the operation of the Russian Federation carried out in the territory of Ukraine has shown the current abilities and readiness of Russia. It is clear that the Russian Federation has developed high readiness and mobility military units that significantly reduce the reaction time of early defence systems. Secondly, the Russian Federation implements its foreign policy by using complex measures that causes so-called hybrid threats. These measures have various manifestations that simultaneously include several areas. The main nature of these measures is gradual weakening of the country by use of internal policy. These measures increase the potential of discontent and protests of the society in order to create open movement against the current leading political force, as well as create violent social unrest. Additionally, the Russian Federation uses economic sanctions, suspension of energy supply, humanitarian influence, informative propaganda, and psychological influence, as well as cyber attacks, aggressive influence agents and surveillance and security agencies, massive external diplomatic and military pressure, and enforcement and legitimisation of alternative political process. These tools also include the ability to launch a traditional military attack. Often it is very difficult to identify the subjects and manifestations of these measures, thus it is more difficult to counter them. Thirdly, the Russian Federation benefits from creating a conflict area near its border, in which the transition from peaceful existence to crisis and later to war is very difficult to identify. Fourthly, the Russian Federation benefits from creating a fictional notion that NATO causes external threats due to internal policy. The government of the Russian Federation implements these measures to rally the society and make it loyal to the current government, simultaneously turning the attention of the society away from internal instability and socio-economic issues. In the context of the national security of the Republic of Latvia these actions cause threats because Latvia is a NATO member state in which military personnel from other NATO member states is located to ensure the security of the country. The Russian Federation not only continues its negative rhetoric against the NATO military personnel being stationed in Latvia by trying to rally the people of Latvia against the notion, but also will try to provoke, for example, will set its military aircraft on course within the airspace of the Republic of Latvia or near it, as well as