Wreaths were laid at the Memorial Gates in central London, as one of the focal points of Commonwealth Day.
Corporal Soviet Baniya of 10 The Queen's Own Gurkha Logistic Regiment played bagpipes, as dignitaries honoured soldiers from Africa, the Caribbean and the five regions of the Indian sub-continent - Bangladesh, India, Nepal, Pakistan and Sri Lanka - who gave their lives in the two world wars.
The Commonwealth Memorial Gates were inaugurated by the Queen in 2002. A wreath-laying ceremony has been held there every year since then.
Among those who spoke at the event was former Royal Artillery officer Johnny Mercer MP, now Britain's minister for defence people and veterans.
Music during the event was provided by the Irish Guards.