Roundheads in the context of "Royal Oak"

Newark-on-Trent (/ˌnjuːərk -/) or Newark is a market town and civil parish in the Newark and Sherwood district in Nottinghamshire, England. It is on the River Trent, and was historically a major inland port. The A1 road bypasses the town on the line of the ancient Great North Road. The town's origins are likely to be Roman, as it lies on a major Roman road, the Fosse Way. It grew up around Newark Castle, St Mary Magdalene church and later developed as a centre for the wool and cloth trades.

In the English Civil War, it was besieged by Parliamentary forces and relieved by Royalist forces under Prince Rupert. Newark has a marketplace lined with many historical buildings and one of its most notable landmarks is St Mary Magdalene church with its towering spire at 232 feet (71 metres) high and the highest structure in the town. The church is the tallest church building in Nottinghamshire and can be seen when entering Newark or bypassing it. The population of the town was recorded at 30,345 at the 2021 census.

Charles I, King of England, Scotland and Ireland, was publicly executed on 30 January 1649 outside the Banqueting House on Whitehall, London. The execution was the culmination of political and military conflicts between the royalists and the parliamentarians in England during the English Civil War, leading to Charles's capture and his trial. On 27 January 1649 the parliamentarian High Court of Justice had declared Charles guilty of attempting to "uphold in himself an unlimited and tyrannical power to rule according to his will, and to overthrow the rights and liberties of the people" and sentenced him to death by beheading.

Charles spent his last few days in St James's Palace, accompanied by his most loyal subjects and visited by his family. On 30 January he was taken to a large black scaffold constructed in front of the Banqueting House, where a large crowd had gathered. Charles stepped onto the scaffold and gave his last speech, declaring his innocence of the crimes of which parliament had accused him, and claiming himself a "martyr of the people". The crowd could not hear the speech, owing to the many parliamentarian guards blocking the scaffold, but Charles's companion, Bishop William Juxon, recorded it in shorthand. Charles gave a few last words to Juxon, claiming an "incorruptible crown" for himself in Heaven, and put his head on the block. He waited a few moments, and after giving a signal that he was ready, the anonymous executioner beheaded Charles with a single blow and held Charles's head up to the crowd silently, dropping it into the swarm of soldiers soon after.

The Cromwellian conquest of Ireland (1649–1653) was the re-conquest of Ireland by the Commonwealth of England, initially led by Oliver Cromwell. It forms part of the 1641-to-1652 Irish Confederate Wars, and wider 1639-to-1653 Wars of the Three Kingdoms. Modern estimates suggest that during this period, Ireland experienced a demographic loss totalling around 15 to 20% of the pre-1641 population, due to fighting, famine and bubonic plague.

The Irish Rebellion of 1641 brought much of Ireland under the control of the Irish Catholic Confederation, who engaged in a multi-sided war with Royalists, Parliamentarians, Scots Covenanters, and local Presbyterian militia. Following the execution of Charles I in January 1649, the Confederates allied with their former Royalist opponents against the newly established Commonwealth of England. Cromwell landed near Dublin in August 1649 with an expeditionary force, and by the end of 1650 the Confederacy had been defeated, although sporadic guerrilla warfare continued until 1653.

Hurst Castle is an artillery fort established by Henry VIII on the Hurst Spit in Hampshire, England, between 1541 and 1544. It formed part of the king's Device Forts coastal protection programme against invasion from France and the Holy Roman Empire, and defended the western entrance to the Solent waterway. The early castle had a central keep and three bastions, and in 1547 was equipped with 26 guns. It was expensive to operate due to its size, but it formed one of the most powerful forts along the coast. During the English Civil War of the 1640s, Hurst was held by Parliament and was used briefly to detain King Charles I before his execution in 1649. It continued in use during the 18th century but fell into disrepair, the spit being frequented by smugglers.

Repairs were made during the French Revolutionary Wars and the Napoleonic Wars with France, and the castle was modernised to enable it to hold 24-pounder (10.8 kg) guns. Fresh fears of invasion followed in the 1850s, leading to heavier, 32-pounder (14.5 kg) armament being installed and new gun batteries being laid out on both sides of the castle. Technological developments rapidly made these defences obsolete, however, and a fresh phase of work between 1861 and 1874 created sixty-one gun positions in two long, granite-faced batteries alongside the older castle. These held very heavy weapons, including massive 12.5 inch, 38 ton (317 mm, 39,000 kg) rifled muzzle-loading guns. As the century progressed these too became outdated, and lighter, quick-firing guns were installed at the castle to replace them.

George Fenwick (1603?–1657), was an English Parliamentarian, and a leading colonist in the short-lived Saybrook Colony.

Harlech Castle (Welsh: Castell Harlech; Welsh pronunciation: [kastɛɬ ˈharlɛχ]) in Harlech, Gwynedd, Wales, is a Grade I listed medieval fortification built onto a rocky knoll close to the Irish Sea. It was built by Edward I during his invasion of Wales between 1282 and 1289 at the relatively modest cost of £8,190. Over the next few centuries, the castle played an important part in several wars, withstanding the siege of Madog ap Llywelyn between 1294 and 1295, but falling to Prince Owain Glyndŵr in 1404. It then became Glyndŵr's residence and military headquarters for the remainder of the uprising until being recaptured by English forces in 1409. During the 15th-century Wars of the Roses, Harlech was held by the Lancastrians for seven years, before Yorkist troops forced its surrender in 1468, a siege memorialised in the song "Men of Harlech". Following the outbreak of the English Civil War in 1642, the castle was held by forces loyal to Charles I, holding out until 1647 when it became the last fortification to surrender to the Parliamentary armies. In the 21st century the ruined castle is managed by Cadw, the Welsh Government's historic environment service, as a tourist attraction.

UNESCO considers Harlech, with three others at Beaumaris, Conwy and Caernarfon, to be one of "the finest examples of late 13th century and early 14th century military architecture in Europe", and it is classed as a World Heritage Site. The fortification is built of local stone and concentric in design, featuring a massive gatehouse that probably once provided high-status accommodation for the castle constable and visiting dignitaries. The sea originally came much closer to Harlech than in modern times, and a water-gate and a long flight of steps leads down from the castle to the former shore, which allowed the castle to be resupplied by sea during sieges. In keeping with Edward's other castles in the north of Wales, the architecture of Harlech has close links to that found in the County of Savoy during the same period, an influence probably derived from the Savoy origins of the main architect, James of Saint George.