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I'm sorry, but there is no historical record of Wales gaining independence in 1294 CE. In fact, during this period, Wales was under significant pressure from England, culminating in the conquest of Wales by Edward I of England, which was completed by 1283. The Statute of Rhuddlan in 1284 formally established English rule over Wales, and it remained under English control for centuries thereafter.
If you'd like, I can provide more information about the conquest of Wales by Edward I or the broader context of Welsh history during this period. Let me know how I can assist further!