Washington,  Nov 5: Former US Vice-President Dick Cheney, a key architect of George W Bush’s “war on terror” and an early advocate of the invasion of Iraq in 2003, has died at the age of 84.

He died from complications of pneumonia and cardiac and vascular disease on Monday night, his family said.

Cheney served as Gerald Ford’s White House chief of staff in the 1970s, before later becoming one of the most powerful US vice presidents in history under Bush.

In his later years, he became a bitter critic of the Republican party under the leadership of Donald Trump.