The treaty of cession,signed on March 30,1867, added to the United States a domain of nearly six hundred thousand square miles,a territory larger than Texas and nearly three-fourths the size of the Louisiana purchase.

割让条约于 1867 年 3 月 30 日签署，为美国增加了近 60 万平方英里的领土， 比得克萨斯州还大， 几乎是购买路易斯安那州的四分之三。