I want to know the answer to the following question:
What year did Bern invade Aargau?
All the background I'm provided with is that "Bern invaded and conquered Aargau in 1415 and Vaud in 1536, as well as other smaller territories; thereby becoming the largest city-state north of the Alps, by the 18th century comprising most of what is today the canton of Bern and the canton of Vaud.". Is that enough to answer the question?