Russia’s S-400 air defense system dominates modern anti-air warfare, countering stealth aircraft, hypersonic threats, and NATO’s 5th-generation fighters with advanced radar and long-range SAM capabilities. This SIGMA Recon Threat Brief exposes how the S-400 tracks, targets, and challenges 5th-generation aircraft.This long-range surface-to-air missile platform (SAM) boasts a reach of 400 km, multi-target tracking, and integrated radar that forces even stealth aircraft into defensive postures. But how much of its reputation is real—and where are its weaknesses?In this briefing, we cover: ✅ Radar acquisition and multi-target tracking ✅ S-400 missile variants and their effective ranges ✅ Real-world use in Ukraine and Syria ✅ Vulnerabilities exposed through combat performance ✅ Strategic implications for NATO, the Middle East, and Eurasian security🔍 Chapters00:00 – Intro00:48 – Background on the S-40001:56 – How the system works05:25 – Combat capabilities and stats06:48 – Global political impact07:30 – SIGMA verdict08:34 – Ground truth: What matters📡 Sources Russian MOD Ukrainian General Staff DIA Threat Assessments Janes Defence, IISS