The British Proclamation of 1763, the war of 1812, geological barriers and the lack of modern-day transportation all provided resistance against westward migration.

英国1763年公告、1812年战争、地理阻隔和现代交通的缺少都对向西迁移产生了阻碍。

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The proclamation applied only to areas under Confederate control, and its legal impact was uncertain, but it redefined the nature of the war and was of great symbolic significance.

此宣言仅适用于南部联盟控制的区域，法律效应并不明确，但该宣言重新定义了这场战争，具有重要的象征意义。

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Almost two years before the Emancipation Proclamation, millions of Americans already understood that this was to be a war for or against slavery.

NEWYORKER: Coming Apart