https://thefederalist.com/2019/04/17/allied-powers-won-fight-sky-world-war-ii/
To achieve air supremacy in war means to be able to put your assets in the air with the ability to destroy your enemy’s cities, troops, and ability to fight back. In the online course, “The Second World Wars,” Professor Victor David Hanson discusses the technological advances in air power made by German, American, and Japanese forces throughout the course of World World II, and how one side slowly achieved air supremacy.
Before 1941, there was a clear pattern to the victories achieved by German forces. Germany invaded Poland, Denmark, Luxembourg, Holland, Norway, Belgium, France, and Yugoslavia. Each one of these victories was against an unprepared neighbor and a surprise attack. Germany shocked everyone with their sudden domination of European democracies, especially with their success with a new military tactic: blitzkrieg. The blitzkrieg method involved violently and quickly mobilizing forces in the air and on the ground, defeating opponents with series of short attacks.
What we know now is that Germany’s opponents, presumably stunned and alarmed by the attacks, never stopped to evaluate the limitations of Germany’s power, specifically in the air. Could they defeat an enemy in a battle that was not a surprise attack? Could their planes reach the United States? Britain? The answer was no.