The former commander-in-chief was treated for pneumonia and was temporarily placed on a ventilator in 2017.
Only one other USA president, John Adams, had a son who also became president.
Following a failed run for the Senate in 1964, Bush entered the US House of Representatives in 1967, serving two terms, until a second bid for the Senate in 1970 again ended in failure.
Mr Bush and his wife, Barbara Bush, had six children and were married for 73 years - the longest presidential marriage in United States history. She reportedly suffered from congestive heart failure and chronic obstructive pulmonary disease.
They were married for 73 years.
During the Second World War, he became the youngest naval pilot at the age of 18 following Japan's attack on Pearl Harbour. Throughout his life and career, President Bush embodied that sense of duty and commitment to bettering our country - whether it was fighting for Americans with disabilities, ensuring clear air for future generations, or bringing a peaceful end to the Cold War. After losing a campaign for the Senate in 1970, Bush was appointed to a series of high-level political positions: U.S. Ambassador to the United Nations, chairman of the Republican National Committee, Chief of the U.S. Liaison Office in Beijing and Director of the Central Intelligence Agency. After he graduated from Yale on an accelerated schedule, the Bushes headed to the oil fields of West Texas.
The 41st commander-in-chief left his mark on almost every area of government as president, vice president, ambassador, Central Intelligence Agency director and a member of Congress.
As he accepted the Republican Party's nomination for president in 1988, Bush pleaded for a "kinder, gentler nation". Together they served two terms in the White House. Dan Quayle of IN as his running mate, and won, IN 1988. At Barbara Bush's funeral, a eulogy was delivered by Jon Meacham, author of a biography of George HW Bush. In 1989, he sent American troops to Panama to depose that country's leader, Gen. Manuel Noriega, who was returned to the U.S.to stand trial as a drug trafficker. He will also designate Wednesday as a national day of mourning. George H.W. Bush was an American hero and icon, he was a friend to all he met, he embodied class and dignity. Bush is expected to lie in state in the US Capitol. When the Soviet Union finally fell, Bush heralded it as a "victory for democracy and freedom" but held back on implementing a US-centric policy on the confederation of nations that emerged.
After Iraq invaded Kuwait in August 1990, Mr Bush quickly began building an global military coalition that included other Arab states. Bush was able to create an worldwide coalition and led a military strike to drive Hussein out of the country.