These examples concentrate mostly on British/American perception management and propaganda. First of all, because they are masters of the art, and secondly, as victors they still dominate the narrative.
Arthur Ponsonby and Falsehood in Wartime
After the Great War came a huge backlash of disillusion and revulsion. Calmly analysed, most of what had been told in the war turned out to be lies and half-truths. «Falsehood in War-time, Containing an Assortment of Lies Circulated Throughout the Nations During the Great War» was the title of a book published in 1928. Written by Arthur, Ponsonby, it discussed 20 instances of lies in wartime.
The contents of the book can be summed up in the Ten Commandments of War Propaganda:
We do not want war.
The opposite party alone is guilty of war.
The enemy is the face of the devil.
We defend a noble cause, not our own interest.
The enemy systematically commits cruelties; our mishaps are involuntary.
The enemy uses forbidden weapons.
We suffer small losses, those of the enemy are enormous.
Artists and intellectuals back our cause.
Our cause is sacred.
All who doubt our propaganda, are traitors.