Russian Rear Area Operations and the Resistance Operating Concept
In 2014, the politico-military face of Europe changed considerably after the Russian Anschluss of Crimea and its follow-on subversion of, and incursion into, eastern Ukraine. While some decried Russia for “acting in a 19th-century fashion”, it became clear to many eastern and central European states, NATO members and non-members alike, that their 21st century security challenges now could include invasion and occupation by the Russian Federation. Nowhere in NATO was this challenge felt more acutely than in the Baltic countries of Estonia, Latvia, and Lithuania. They had regained their sovereignty after the fall of the Soviet Union, but unfortunately also regained the same geopolitical challenges to their security that they faced during their interwar existence – limited territory providing no strategic depth and a small population unable to generate conventional military forces that could deter a Kremlin hostile to their independence.
In response to Russian aggression in Ukraine, NATO took specific steps to increase Baltic security. Since 2017, four multinational battlegroups totaling approximately 4,500 troops have been deployed to the Baltic states and Poland to serve as a proportionate deterrent force and to send a clear message that an attack on one would be met by troops from across the alliance. NATO has improved its security posture in the Baltics through multiple deployments and exercises and by investing in infrastructure and pre-positioned forces via the European Deterrence Initiative.