The Taoiseach has attended the Royal British Legion's Remembrance Day ceremony in Enniskillen, Co Fermanagh.
The event also marks the 34th anniversary of the IRA's bombing in the town, in which 12 people were killed.
Micheál Martin laid a wreath at the war memorial in Enniskillen, continuing a tradition started by Taoiseach Enda Kenny in 2012. He then attended a church service in the town.
A large crowd gathered for the event after Covid-19 restrictions severely limited last year's service.
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Those who attended included the Deputy US Consul General, the Honorary Consul of Poland and Northern Ireland's veterans commissioner, the former Ulster Unionist MP Danny Kinahan.
Speaking on the Taoiseach's attendance, Northern Ireland Veterans Commissioner Danny Kinahan said: "I think it's incredibly important. In the early days when I went to Dublin, wearing a poppy was frowned on.
"We've all moved on, and it shows the Irish Government supporting veterans and supporting those who gave their lives, in particular in the First and Second World War.
"There were many Irish - north and south - who were involved and really it is a huge part of our past."
Mr Martin was joined by Northern Ireland Education Minister Michelle McIlveen.
Former Northern Ireland First Minister Arlene Foster, a native of Enniskillen, attended the event in a private capacity.
She stood alongside relatives of those killed in the bombing of 1987, at the Clinton Centre, the location where the bomb that killed 12 people went off.
It came as Buckingham Palace announced that Britain's Queen Elizabeth was unable to attend the Remembrance Sunday event in London, having sprained her back.
In a statement, the palace said it was with "great regret" Queen Elizabeth would be unable to attend the service.
Additional reporting: PA