Complex sentence: During the French Revolutionary Wars of the 1790s, the French Republican armies expanded eastward, enveloping Switzerland on the grounds of "liberating" the Swiss people, whose own system of government was deemed as feudal, especially for annexed territories such as Vaud.
Split into simpler sentences: During the French Revolutionary Wars of the 1790s, the French Republican armies expanded eastward. The French Republican armies enveloped Switzerland on the grounds of "liberating" the Swiss people, whose own system of government was deemed as feudal, especially for annexed territories such as Vaud.