Complex sentence: At the Treaty of Westphalia in 1648, the Sundgau became part of France, and in the 18th century, the Habsburgs acquired a few minor new territories in southern Germany such as Tettnang.
Split into simpler sentences: At the Treaty of Westphalia in 1648, the Sundgau became part of France. In the 18th century, the Habsburgs acquired a few minor new territories in southern Germany such as Tettnang.