Piccolomini's marching order at the relief of Thionville, 7 June 1639
Piccolomini's relief column at Thionville, 7 July 1638
Source: Theatrum Europaeum, eng. by M. Merian
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Early in the morning on 7 June 1639 a relief column under Piccolomini broke French siege lines around Thionville & entered the town. Later the same day Imprerial army attacked & defeated French army under marshal Feuquieres.