Dick Cheney, the former US vice president who oversaw the invasions of Afghanistan and Iraq and the so-called "war on terror", died on Tuesday at the age of 84.

Cheney's family said in a statement that the former vice president died from complications of pneumonia and cardiac and vascular disease.

"For decades, Dick Cheney served our nation, including as White House Chief of Staff, Wyoming’s Congressman, Secretary of Defense, and Vice President of the United States," a family statement read.

"We are grateful beyond measure for all Dick Cheney did for our country."

Cheney, who served in the Republican administration of President George W Bush between 2001-2009, began his political career in 1969, when he worked alongside Donald Rumsfeld in Richard Nixon's administration.