Complex sentence: The six districts of the Lower Valais were known as "banners" ("vexilla ") and only came to be referred to as"dizains" as they acceded to the Rhodanic Republic and the Swiss canton, during 1802--1815.
Split into simpler sentences: The six districts of the Lower Valais were known as "banners" ("vexilla "). They only came to be referred to as"dizains" as they acceded to the Rhodanic Republic and the Swiss canton, during 1802--1815.