And for those in the northwest, it called for free land for settlers, and federal aid to build roads and canals.

VOA: special.2009.07.09

They build these three large canals and this expands the area of the city by four times.

他们凿建了三条巨大的运河,使得城市面积扩大了四倍

耶鲁公开课 - 欧洲文明课程节选