Formation Flying Manual.
Excellent general training site
These are Downloadable Files
Intercepts and Combat Managemnet Diagrams
Formation Management Diagrams
Operational Radio Phraseology
Aircraft Mission roles and Descriptions

These are articles you can read now
SimHQ 'Radio Brevity Code and Comms Discipline' by Vince 'Beer Camel' Putze
SimHQ 'Online Formation Flying' by Andy Bush
Dan 'Crash' Crenshaws 'How to Live and Die in the Virtual Sky'
SimHQ 'BFM 101 Part 1' by Andy Bush
SimHQ 'BFM 101 Part2' by Andy Bush
SimHQ Boom n Zoom 4 part article by Andy Bush and is a real gem
SimHQ 'Tactics 101 Part 1' by Ed 'Skater' Lynch. Intro and Lag Pursuit
SimHQ 'Tactics 101 Part 2' by Ed 'Skater' Lynch. Pure and Lead Pursuit
SimHQ 'Tactics 101 Part 3' by Ed 'Skater' Lynch. Offensive and Defensive Manouevres
How to Fly a Scissors
Soviet Fighter Tactics
Dogfighting at a disadvantage