Question: Synod of Chester led to a battle with a victory for who?
Context: The Non-subscribing Presbyterian Church of Ireland has its origins with those early 18th-century Presbyterian ministers who refused to subscribe at their ordination to the Westminster Confession, a standard Reformed (Calvinist) statement of faith; and who were placed, in 1725, the Presbytery of Antrim.  A similar disagreement led to the creation of the Remonstrant Synod of Ulster in 1830.  In 1835 the two bodies together with the Synod of Munster formed the Association of Irish Non-subscribing Presbyterians". The Synod of Chester (Medieval Latin: "Sinodus Urbis Legion(um)") was an ecclesiastical council of bishops held in Chester in the late 6th or early 7th century.  The period is known from only a few surviving sources, so dates and accounts vary, but it seems to have been a major event in the history of Wales and England, where the native British bishops rejected overtures of peace from Augustine's English mission.  This led directly to the Battle of Chester, where Æthelfrith of Northumbria seems to have killed the kings of Powys and (possibly) Gwynedd during an attack on the ecclesiastical community at Bangor-on-Dee. Upstate New York Synod of the Evangelical Lutheran Church in America (ELCA) is led by bishop John Stanley Macholz, who was preceded by the Rev. Marie C. Jerge, and is a Companion Synod of the Evangelical Lutheran Church in Zimbabwe, a partner synod with the Central/Southern Illinois Synod, and a Reconciling in Christ Synod.  It is composed of 170 congregations in Upstate New York Lutheran Worship ("LW") is one of the official hymnals of The Lutheran Church–Missouri Synod.  Published in 1982 by Concordia Publishing House in St. Louis, Missouri, it is the LCMS's third English-language hymnal and was intended to replace "The Lutheran Hymnal" ("TLH") (1941).  However, dissatisfaction with various revisions has led numerous congregations to continue using the previous hymnal, and according to a 1999 LCMS Commission on Worship survey, "The Lutheran Hymnal" is still used by 36% of churches in the Synod as their primary hymnal.  The publication of another new hymnal, "Lutheran Service Book" in 2006, has restored many of the former hymnal's features in the hope that more widespread use can be achieved. The Battle of Riade or Battle of Merseburg was fought between the troops of East Francia under king Henry I and the Magyars at an unidentified location in northern Thuringia along the river Unstrut on 15 March 933.  The battle was precipitated by the decision of the Synod of Erfurt to stop paying an annual tribute to the Magyars in 932.  Recorded by the Saxon chronicler Widukind of Corvey, it was a morale-boosting victory for the East Franks. The Lutheran Synod of Buffalo, founded in 1845 as the Synod of Lutheran Emigrants from Prussia (German: "Synode der aus Preussen ausgewanderten lutherischen Kirche" ), was commonly known from early in its history as the Buffalo Synod.  The synod resulted from the efforts of pastor J. A. A. Grabau and members of his Erfurt and other congregations to escape the forced union of Lutheran and Reformed churches in Prussia by immigrating, in 1839, to New York City and Buffalo, New York, and to Milwaukee, Wisconsin, with Grabau and the largest group settling in Buffalo.  Internal disputes regarding theology and practice led to a major schism in the 1880s.  In 1930 it merged with the Ohio Synod and the Iowa Synod to form the first instance of the American Lutheran Church (ALC).  The latter body, after further mergers, became part of the Evangelical Lutheran Church in America in 1988. The Synod of Diamper, held at Udayamperoor (called Diamper in non-vernacular sources), was a diocesan synod or council that laid down rules and regulations for the ancient Saint Thomas Christians of the Malabar Coast (modern Kerala state, India), formally uniting them with the Catholic Church.  This led to the creation of the Eastern Catholic Syro-Malabar Church, which follows a latinized East Syrian Rite liturgy. The Archdiocese of Cashel and Emly (Irish: "Ard-Deoise Chaisil agus Imligh" ) is a Roman Catholic archdiocese in mid-western Ireland.  The archdiocese is led by the Archbishop of Cashel and Emly, who serves as pastor of the mother church, the Cathedral of the Assumption and metropolitan of the ecclesiastical province of Cashel and Emly.  The Diocese of Cashel was established in 1111 by the Synod of Rathbreasail.  The ecclesiastical province, which was roughly co-extensive with the secular province of Munster, was created in 1152 by the Synod of Kells.  The cathedral church of the archdiocese is located in Thurles, County Tipperary.  The incumbent archbishop is Kieran O'Reilly. The Southeastern Pennsylvania Synod of the Evangelical Lutheran Church in America is the regional ELCA judicatory of the Philadelphia metropolitan area.  The synod covers Bucks, Chester, Delaware, and Montgomery counties as well as the City of Philadelphia. The Battle of Chester (Old Welsh: "Guaith Caer Legion"; Welsh: "Brwydr Caer") was a major victory for the Anglo Saxons over the native Britons near the city of Chester, England in the early 7th century.  Æthelfrith of Northumbria annihilated a combined force from the Welsh kingdoms of Powys, Rhôs (a cantref of the Kingdom of Gwynedd) and possibly Mercia.  It resulted in the deaths of Welsh leaders Selyf Sarffgadau of Powys and Cadwal Crysban of Rhôs.  Circumstantial evidence suggests that King Iago of Gwynedd may have also been killed.
Answer: Anglo Saxons