On which route did RMS Queen Mary sail between 1936 and 1967, only interrupted by World War II?

Explanation

RMS Queen Mary is a retired ocean liner that sailed between Southampton and New York from 1936 to 1967. The ship is 311 metres long and 79 metres tall, making it the second largest passenger ship in the world, only overtaken by its sister ship, RMS Queen Elizabeth. During World War II, Queen Mary was used to transport troops from Australia and New Zealand to the United Kingdom. It could carry more than 15,000 soldiers at a time.