How did brazil achieve freedom

how, by whom, and when?

When: Brazil gained its independence on September 7th, 1822,

How: When Dom Pedro announced officially or publicly Brazil's independence after an showing an feeling active opposition or hostility toward Portugal - - proved too much for the Brazilian people.

Whom: It all began when Napoleon I invaded Portugal in 1807.

Brazil gained its independence on September 7th, 1822, when Dom Pedro proclaimed Brazil's independence after an antagonistic relationship with Portugal proved too much for the Brazilian people. It all began when Napoleon I invaded Portugal in 1807.