Europe
Asia
Oceania
Americas
Africa
If War Plan Red had gone ahead, Americ
A prolonged conflict, a modified Treaty of Versailles and no League of Nations may have transpired without direct American involvement in WWI
Could lessons from the last great conflict help the democratic world triumph over the rise in autocratic power?
America withdraws its troops, missiles and money, and leaves Europe to fend for itself against the USSR
Our pick of the latest military history books
In the event of a Nazi invasion, Britain would have deployed a network of deadly defences to impede the enemy at every turn
Confederate victory at Antietam might have contributed to the end of Abraham Lincoln’s presidency in the election of 1864