Air-to-Air Combat

From DCS World Wiki - Hoggitworld.com
The Art of the Kill - Classic Falcon Era video explaining the basic concepts of close range air-to-air combat.
The greatest mustache in the USAF explaining how to kill a man in "The Art of the Kill"
TAWDCS;s Radar simulator - Great for visualizing how RADAR works.
TAWDCS's RADAR simulator showing how radar works in 3D space

Mudspike's F-15C Combat Guide for Beginners

Ktulu2's BVR Guide - F-15C centric, but many of the concepts work across all aircraft.