In the conference, Arminianism was not condemned and the writings of Richard Montagu were discussed: not condemned , creating a pro-Arminian, anti-calvinist faction at court.
Impeachment is when a person is accused by the House of Commons and tried by the House of Lords- its a serious legal process and only used when Parliament does not believe their grievances can be resolved any other way
To prevent the impeachment, Charles dissolved Parliament. This saved Buckingham but deprived him of 4 subsidies.Sir John Elliot and Sir Dudley Digges were sent to the Tower of London for bringing the charges