Why did prince henry think it was worthwhile for the portuguese to explore africa

What was the significance of the battle of saratoga

In ohio in 1872, the cleveland massacre was a violent labor dispute at standard oil refineries in cleveland. a takeover by standard oil of the refineries in cleveland. an attempt to stop standard oil from becoming a monopoly. a failed attempt by standard oil to take over other refineries.

Why didn’t the portuguese have access to the territory that is present-day latin and north america