I want to know the answer to the following question:
When were the first set of subsidiary forts planned?
All the background I'm provided with is that "However, this plan came to fruition only in November 1723, when Captain Manuel Henriques de Noronha reached the shores of Montevideo with soldiers, guns and colonists on his warship Nossa Senhora de Oliveara.". Is that enough to answer the question?
Answer: no