Roosevelt first knew this land only as the Dakota Territory.

罗斯福最初只知道这片土地是达科他领地。

In late August, they arrived in the region that would later become the Dakota Territory.

8 月下旬，他们抵达了后来成为达科他州的地区。

Roosevelt moved to a ranch in the Dakota territory of the American West. He began to raise beef cattle. At first, the local cowboys laughed at him.

罗斯福搬到了美国西部达科他州的一个牧场，他开始饲养肉牛。起初，当地的牛仔们嘲笑他。

For a long time the Dakota territory, organized in 1861, had been looked upon as the home of the powerful Sioux Indians whose enormous reservation blocked the advance of the frontier.

达科他领土于 1861 年成立，长期以来一直被视为强大的苏族印第安人的家园， 他们巨大的保留地阻碍了边境的推进。