They founded Plaid Genedlaethol Cymru () ( which would become Plaid Cymru ), on 5 August 1925.

During the inter-war years, Plaid Genedlaethol Cymru was most successful as a social and educational pressure group rather than as a political party.

The events surrounding the protest, known as Tân yn Llŷn ( Fire in Llŷn ), helped define Plaid Genedlaethol Cymru.

Plaid Genedlaethol Cymru was officially neutral regarding involvement the Second World War, which Lewis and other leaders considered a continuation of the First World War.

In 1943 Lewis contested the University of Wales parliamentary seat at a by-election, his opponent was former Plaid Genedlaethol Cymru deputy vice-president Dr. William John Gruffydd.

But it was Lewis ' " brilliance and charismatic appeal " which was firmly associated with Plaid Genedlaethol Cymru in the 1930s.

cy: Plaid Genedlaethol Gwlad y Basg

During the inter-war years, Plaid Genedlaethol Cymru was most successful as a social and educational pressure group rather than as a political party.

The events surrounding the protest, known as Tân yn Llŷn ( Fire in Llŷn ), helped define Plaid Genedlaethol Cymru.

Plaid Genedlaethol Cymru members were free to choose for themselves their level of support for the war effort.

Plaid Genedlaethol Cymru was officially neutral regarding involvement the Second World War, which Valentine, Lewis and other leaders considered a continuation of the First World War.

The events surrounding the protest, known as Tân yn Llŷn ( Fire in Llŷn ), helped define Plaid Genedlaethol Cymru.

cy: Categori: Plaid Genedlaethol yr Alban

* 1925 – Plaid Cymru is formed with the aim of disseminating knowledge of the Welsh language that is at the time in danger of dying out.

Plaid Cymru gained and lost a seat to Labour respectively.

An additional problem was competition in the Liberal heartlands in Scotland and Wales from the Scottish National Party and Plaid Cymru who both grew as electoral forces from the 1960s onwards.

The split with Mebyon Kernow was down to the same debate that was occurring in most of the political parties campaigning for autonomy from the United Kingdom at the time ( for example the Scottish National Party and Plaid Cymru ), whether to be a centre-left party appealing to the electorate on a social democratic line, or whether to appeal emotionally on a centre-right cultural line.

The campaign was taken so seriously by Gwynfor Evans, former president of Plaid Cymru, that he threatened the government with a hunger strike were it not to honour the plans.

It was addressed by Labour MPs Jon Trickett, Emily Thornberry, John McDonnell ( politician ) | John McDonnell, Michael Meacher, Diane Abbott and Jeremy Corbyn, and Elfyn Llwyd of Plaid Cymru and Angus MacNeil of the Scottish National Party.

The EFA supplied ten members: two of the Scottish SNP, two of the Welsh Plaid Cymru ( PC ), two of the Flemish VU, one of the Basque PNV, one of Basque Solidarity ( EA ), one of the Andalusian PA, and one of the Galician Nationalist Bloc ( BNG ).

The other members of the Bureau are all vice-presidents: Jill Evans ( Plaid Cymru ), Gustave Alirol ( Occitan Party ), Fabrizio Comencini ( Liga Veneta Repubblica ), Ana Miranda Paz ( Galician Nationalist Bloc ), Ian Hudghton ( Scottish National Party ), Sybren Posthumus ( Frisian National Party ), Sebastian Colio ( Basque Solidarity ), Dimitrios Ioannou ( Rainbow ), Rolf Granlund ( Future of Åland ), Reinhild Campidell ( South Tyrolean Freedom ) and Lucy Collyer ( Majorca Socialist Party ).

Conservative Party ( 213 ) Liberal Democrats ( 90 ) HM Most Loyal Opposition Labour Party ( 226 ) Other Opposition Democratic Unionist Party ( 4 ) Ulster Unionist Party ( 3 ) UKIP ( 3 ) Plaid Cymru ( 2 ) Crossbenchers ( 177 ) Lords Spiritual ( 26 ) Non-affiliated ( 21 )

On 25 August 2004, Plaid Cymru MP Adam Price announced his intention to move for the impeachment of Tony Blair for his role in involving Britain in the 2003 invasion of Iraq.

The party is a member of the European Free Alliance and has close links with Plaid Cymru, the Scottish National Party and the Breton Democratic Union.

The party has close links with Plaid Cymru ( their partner in the EFA ) including a twinning arrangement with Plaid's Blaenau Gwent branch, and to a lesser extent with the SNP.

* Plaid Cymru, a political party in Wales

* Plaid Cymru, a Welsh nationalist political party

The SNP retains close links with Plaid Cymru, its counterpart in Wales.

Both the SNP and Plaid Cymru are members of the European Free Alliance ( EFA ), a European political party for regionalist national-level political parties.

* Plaid Cymru, the Welsh nationalist party, has had continuous representation in Parliament since 1974.

** Gwynfor Evans becomes member of Parliament for Carmarthen, the first Plaid Cymru MP in the UK.

* Jonathan Edwards ( British politician ) ( born 1976 ), Plaid Cymru Member of Parliament since 2010

* The phrase ' red-green alliance ' has also been used to describe the One Wales coalition in the Welsh Assembly following the 2007 elections between the Welsh Labour Party and Plaid Cymru.

It has a long standing alliance with the European Free Alliance ( EFA ), an alliance of " stateless nations ", such as the Welsh nationalist Plaid Cymru and Scottish National Party.

The Labour Party replaced the Liberal Party as the dominant political force in the 1940s, while the nationalist party Plaid Cymru gained momentum in the 1960s.

Plaid Cymru was formed in 1925 but initially its growth was slow and it gained few votes at parliamentary elections.

He was a prominent Welsh nationalist and a founder of the Welsh National Party ( later known as Plaid Cymru ).

The 1982 Steve Martin comedy Dead Men Don't Wear Plaid was shot in black-and-white as a parody of a 1940s film noir and included footage of actors from the film-noir era such as Humphrey Bogart, Burt Lancaster, and others spliced in with the modern actors.

In 1939 Lewis resigned as Plaid Genedleathol Cymru president citing that Wales was not ready to accept the leadership of a Roman Catholic.

Lewis ' intent was to motivate Plaid Cymru into more direct action promoting the language, however it led to the formation of Cymdeithas yr Iaith Gymraeg ( the Welsh Language Society ) later that year at a Plaid Cymru summer school held in Pontardawe in Glamorgan.

While Plaid Cymru regarded itself as the natural beneficiary of devolution, others attributed its performance in large part to the travails of the Labour Party, whose nomination for Assembly First Secretary, Ron Davies, was forced to stand down in an alleged sex scandal.

The ensuing leadership battle, won by Alun Michael, did much to damage Labour, and thus aided Plaid Cymru, whose leader was the more popular and higher profile Dafydd Wigley.

In the 2001 general election, Plaid Cymru lost Wyn Jones's former seat of Ynys Môn to Albert Owen, but gained Carmarthen East and Dinefwr, where Adam Price was elected.

On 15 September 2003 folk-singer and county councillor Dafydd Iwan was elected as Plaid Cymru's president.

In the general election of 5 May 2005, Plaid Cymru lost the Ceredigion seat to the Liberal Democrats, the result was a disappointment to Plaid, who had hoped to gain Ynys Môn.

Thomas was fervently attached to the Royal Family and also strongly opposed to Plaid Cymru and particularly to the Welsh Language Society.