The Battle of Grand Gulf was fought on April 29, 1863, during th: The Church of England is the established church in England.[372] It retains a representation in the UK Parliament, and the British monarch is its Supreme Governor.[373] In Scotland, the Church of Scotland is recognised as the national church. It is not subject to state control, and the British monarch is an ordinary member, required to swear an oath to "maintain and preserve the Protestant Religion and Presbyterian Church Government" upon his or her accession.[374][2][375] The Church in Wales was disestablished in 1920 and, because the Church of Ireland was disestablished in 1870 before the partition of Ireland, there is no established church in Northern Ireland.[376] Although there are no UK-wide data in the 2001 census on adherence to individual Christian denominations, it has been estimated that 62 per cent of Christians are Anglican, 13.5 per cent Catholic, 6 per cent Presbyterian, and 3.4 per cent Methodist, with small numbers of other Protestant denominations such as Plymouth Brethren, and Orthodox churches.[377]