求翻译：摘要：公元986年，宋太宗发动了收复燕云十六州的雍熙北伐，最终以北伐军失败而告终，这次战役是宋辽关系史上最为重要的一次战役，并逐步形成了宋辽的长期对峙。雍熙北伐失败的原因是多方面的，特别与北宋的军政体制及外交活动关系密切。是什么意思？

Abstract: AD 986, Taizong launched the recovered Yanyun 36 states Yongxi Northern Expedition, and eventually to the Northern Expeditionary Army failed in the end, this battle is the most important battle in the history of the Song, Liao and relations, and gradually formed the Song, Liao and long-ter

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Abstract: A.D. 986 years, Song Taizong started to regain swallow cloud 16 states the harmony bright Northern Expedition, finally was defeated by the Northern Expeditionary Army comes to an end, this campaign was in the Song distant relations history a most important campaign, and formed Song Liao to

Summary: in 986, Emperor Taizong of Song launched a recovery of Yan Yun yongxi Northern Expedition in 16 States, eventually ended in the Northern Expedition army failed, the battle is one of the most important in the history of song-Liao relations, campaigns, and gradually formed a long-term confron

正在翻译，请等待...