Millions of people were also glued to their television screens at home as Portsmouth paid a fitting tribute to the sacrifice made during the Second World War.
As part of our look back at the event last year, here are some of our pictures of the world leaders and veterans arriving in Southsea.
1. D-Day 75
US President Donald Trump (R) and First Lady Melania Trump (L) disembark from the Marine One helicopter after arriving at Southsea Castle.
2. D-Day 75
Veteran Bertie Billet attends the D-Day 75 commemorations
3. D-Day 75
Former British Royal Marine, and D-Day veteran Jim Booth, reacts as he poses for a photograph
4. D-Day 75
Former British Royal Marine, and D-Day veteran Jim Booth (C), talk with armed members of Britain's police.