David Cameron has announced £1 million to maintain the Armed Forces Memorial honouring service personnel who have been killed in conflicts including Iraq and Afghanistan.
The Government is committed to fund the monument, at the National Memorial Arboretum in Staffordshire, through to the end of the next parliament, No 10 said.
Ahead of the Nato summit in Newport, the Government also announced £2.26 million of funding for a project in Wales to help veterans adjust to civilian life.
The Armed Forces Memorial commemorates more than 16,000 people who have died on duty since the end of the Second World War, and a dedication service will be held tomorrow for the 17 names added to the monument following their deaths in 2013.
The £2.26 million of funding for First Choice Housing Association's veterans accommodation scheme will help the organisation address the needs of veterans from across the UK that wish to settle in Wales and the borders by supporting their transition into civilian life and employment, with projects running in Wrexham, Flintshire and Ceredigion.
The money comes from the £40 million veterans accommodation fund established with the proceeds of fines on City firms for fiddling Libor rates.
Mr Cameron, who will use the Nato summit to push for an international declaration building on the work of the UK's military covenant, said: "For the last four years, I've put strengthening respect and increasing support for our armed forces at the heart of this Government's agenda.
"This week, I want to build on that at the Nato summit in Wales by establishing a new Nato Alliance Declaration that will set out our shared commitment to supporting our armed forces and their families and providing them with the help they need.
"We must also ensure we honour properly those who have given their lives in the service of their country and that's why this extra funding for the Armed Forces Memorial is so important. It will ensure we maintain this special place where families and friends can go to remember their loved ones.
"And I'm pleased that we are also continuing our work to support veterans across the country. This Libor funding will help veterans in Wrexham, Ceredigion and Flintshire to make the transition into civilian life, providing assistance as they find new jobs and homes."
Chris Simpkins, director general of The Royal British Legion, said: "The Legion and the trustees of the Armed Forces Memorial are delighted that the Government continues to recognise the importance of the Legion's National Memorial Arboretum at the year-round Centre of Remembrance and of maintaining the iconic Armed Forces Memorial.
"This new grant ensures that we can now carry out vital work to maintain the Memorial to the highest standards to honour those who have given their lives in the service of their country."