LONDON - Paddy Ashdown, the face of centrist politics in Britain for more than a decade and a one-time marine commando who sought to secure peace in the former Yugoslavia, died on Saturday after being treated for cancer. He was 77.

Ashdown led the Liberal Democrats for 11 years up to 1999, steering it to become a campaigning force in British politics against the Conservatives and the Labour Party.

The party said Ashdown died on Saturday evening after a short illness. He had recently been hospitalised with bladder cancer.

It said he would be remembered as someone who made an immeasurable contribution to furthering the cause of liberalism.

Tributes came in from across the political spectrum. Prime Minister Theresa May said Ashdown served his country with distinction. "He dedicated his life to public service and he will be sorely missed," she said in a statement.

Calling Ashdown a "true patriot", former Conservative Prime Minister John Major said: "In Government, Paddy Ashdown was my opponent. In Life, he was a much valued friend."

Jeremy John Ashdown was born in India on Feb. 27, 1941, the eldest son of an Indian army colonel. When he was five, his father became a pig-farmer in Northern Ireland.

He was educated at an English private school where he earned the nickname Paddy because of his strong Irish accent.

He spent years in the Royal Marines, and was on active service as a commando in the jungles of Borneo. He entered parliament in 1983 and was virtually unknown when he became leader of the pro-European party five years later.