Here you can see the immigrants being stopped at the border by a sheriff. I don’t know what the artists had in mind, but here is my interpretation of the symbolism: The ship is, I think, the Mayflower, and symbolizes the first settlers (immigrants) to the United States—the people responsible for the foundation of the country. The crosses, to me, stand for people who lost their lives trying to cross the border into the United States.
The strength of women from many cultures helped build the United States. They are led here by Rosie the Riveter, a World War II icon.
Rosie was a propoganda figure used to encourage American women to work in the factories in place of the men who had gone to war.