Map was prepared by Charles Joseph Minard in 1866. The single map shows ups and downs of relationship between countries during civil war (1861-1865). During civil war, the southern US in strategy of seeking support from Europe cut off the supply of cotton and wool to Europe. They thought that Europe will help them in war to save their domestic industries as southern Us was their only supply but their strategy failed. Instead of helping them Europe built relations with other countries and started importing raw material from them.
This colored lines indicate the quantity of cotton and wool being exported to Europe. Blue represents cotton and wool from the United States, the orange from British territories in South Asia, and brown from the East Mediterranean. Pink represents cotton and wool imported to Britain that was re-exported to Europe, Sliver shows imports from Brazil. One millimeter represents 5,000 tons of cotton or wool. The map of successive years show how due to civil war cotton and wool import, which was maximum lead to minimum from US and the import which was minimum till 1860s lead to maximum in southern Asian till 1865. This map shows Industrial revolution of Cotton and Wool textile.
Image source: http://www.yorokobu.es/edward-tufte/