For the first time, the world's governments will jointly declare that the global environment is threatened, that it's everybody's problem and that the solution lies in collective action.

On Thursday, Germany, France, Britain and the European Union, endorsed by Washington, jointly declared an end to negotiations.

Britain and France jointly declared war on Germany, resulting in World War II.

"We must declare jointly and solemnly: We Germans have no territorial claims to any of our neighbors, including Poland," he said.

On Wednesday, leading scientists and evangelical pastors jointly declared their intention to fight the causes of climate change and the public confusion on the subject.

In 1912 the Balkan League-consisting of Serbia, Montenegro, Greece and Bulgaria-had jointly declared war against the Ottoman Empire.

Three years later, in 1700, Denmark, Poland and Russia, the countries that had lost the most provinces to Sweden, jointly declared war.

Kohl and President Mitterrand of France jointly declared that "the accomplishment of Germany unity.gives.a new dimension and broader horizons to our co-operation".

In 1969, the US and Canadian governments jointly declared their intention to make Chilkoot Trail a component of a Klondike Gold Rush International Historic Park.

Finally, however, Hitler pushed France and Britain too far, and they jointly declared war when Germany invaded Poland in September 1939.