Control over the routes through the Valtellina to the passes between Lombardy and the Danube watershed was at stake .
During the Thirty Years ' War , the Valtellina was a theater of intense military and diplomatic struggle among France , the Habsburg powers and the local authorities .
Control over the routes through the theater to the passes between Lombardy and the Danube watershed was at stake .
During the Thirty Years ' War , the Valtellina was a theater of intense military and diplomatic struggle among France , the Habsburg powers and the local authorities .