求翻译：837年丹麦维京人登陆爱尔兰，于851年统治爱尔兰。为了和丹麦维京人争夺爱尔兰挪威维京人和丹麦维京人展开了长期的斗争。并最终建立了爱尔兰维京国家。那时，很多爱尔兰人已开始信奉基督教。哈拉尔德三世的死成为维京时代的终结。是什么意思？

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837 Denmark Vikings landed Ireland, 851 years ruled Ireland. And Denmark Vikings compete for Ireland Norway Vikings and Denmark Vikings began a long struggle. And the eventual establishment of Ireland Virgin State. At that time, a lot of Ireland had begun a Christian. Became Harald III's death end o

837 Denmark Vikings landed Ireland, 851 years ruled Ireland. And Denmark Vikings compete for Ireland Norway Viking and the Denmark Vikings launched a long-term struggle. And eventually establishing Ireland Virgin State. At that time, a lot of Ireland had begun a Christian. Harald III's death become