Complex sentence: Archduke Charles of Austria was unable to stop Napoleon from invading the Tyrol, and the Austrian government sued for peace in April, simultaneous with a new French invasion of Germany under Moreau and Hoche.
Split into simpler sentences: Archduke Charles of Austria was unable to stop Napoleon from invading the Tyrol, and the Austrian government sued for peace in April. At the same time there was a new French invasion of Germany under Moreau and Hoche.