The Third Order is the time period in which the Earth is under the dominant control of Squackle Inc. The Earth is renamed "Squackle Land" as a result. Squackle Inc. owns the majority of businesses and provides all of the vital services in some form across the world.
With the passing of the Second Order, dangerous beings from Space began to invade Squackle Land or take it over, and Squackle Inc. silently quells those threats, as well as those on Squackle Land itself.
The Third Order is the current order, and will never "end."