Britain is the world's sixth largest economy so it depends on your definition of 'unsuccessful'.
Munich Conference
That plan was called Continental Blockade and forbade any direct and/or indirect form of commerce with Great Britain and its colonies.
That is the correct spelling for "unsuccessful."
the Final Solution was unsuccessful.
When the Roman Empire withdrew from Britain in the 5th Century AD, Germans from across the North Sea invaded Britain. King Arthur rallied the Britons against these invaders, although he was unsuccessful in keeping them out.
"un" is a prefix in the word unsuccessful.
He attempted to destroy the Royal Air Force as a precursor to an invasion of the UK. His losses were so high that he abandoned his invasion plans (Operation Sealion).
I think he meant that Britain was losing the war,therefore the offer was useless and they will be unsuccessful after the war.
A unsuccessful Collision is when the two elements did not react with each other.
Despite her best efforts, Mary was unsuccessful in securing a job at the company.
in the 1800s, why were many labor strikes unsuccessful?
The team's attempt to launch the product was unsuccessful despite their best efforts.