 Four years later Frederick was in action again, this time during the Franco-Prussian War of 1870, in which he was once more paired with Blumenthal and commanded the III Army, consisting of troops from the southern German states.He was praised for his leadership after defeating the French at the battles of Wissembourg and Wörth, and met with further successes at the Battle of Sedan and during the Siege of Paris.Frederick's humane treatment of his country's foes earned him their respect and the plaudits of neutral observers.