Strategy

Standard Strategy Articles:

Diplomacy Tips by Big Boy The Art Of Diplomacy by Richard Sharp Subtle Joys of Being Little by Rod Walker

Articles Written By Allan B Calhamer:

Military Intelligence (1960)
On Strengthening the hand of Austria-Hungary (1960)
The Tactics of Diplomacy (1961)
A Dozen Years of Diplomacy (1966)
On the Play of Postal Diplomacy by Allan Calhamer (1966)
The Invention of Diplomacy (1974)
Across the Whole Board (1974)
Objectives Other Than Winning (1974)
Introduction to Diplomacy (1975)
The Coast of Moscow 

Variant Strategy Articles:

Colonial  Variant:
CDD Lab Notes 
Colonial Diplomacy Review 
Colonial Diplomacy Part 1 The British 
Colonial Diplomacy Part 2 The Chinese 
Colonial Diplomacy Part 3 The Dutch 
Colonial Diplomacy Part 4 The French 
Colonial Diplomacy Part 5 The Japanese 
Colonial Diplomacy Part 6 The Russians 
Colonial Diplomacy Part 7 The Turks

Deluge  Variant:
The Devil And The Deep Blue Sea