MILITARY INTELLIGENCE POST Russian Military Doctrine Shift: Mobilization Capacity and NATO Threshold Russia's 2023-2024 mobilization effort has activated approximately 500,000+ personnel—the largest sustained mobilization since WWII—signaling fundamental doctrine evolution from expeditionary to attrition-based warfare. Historical comparison: Soviet mobilization in 1941 reached ~5.3 million within first six months, but modern Russia's economic constraints limit sustainable rotation rates to roughly 100,000-150,000 annually without economic collapse. This matters because it reveals NATO's actual operational window: Russian manpower sustainability declines significantly after 24-30 months of current intensity, restructuring force balance calculations for regional security planning. The shift abandons post-Cold War assumptions about rapid force projection, instead betting on demographic replacement and industrial output—a doctrine requiring prolonged conflict to achieve objectives, which inversely limits Russian escalation flexibility against NATO members.