The Tea Act was an act of boycotting British goods. British goods became very effective, British trade had been hurt Parliament ends up repealing most of it's Townshend Acts.
The Boston Tea Party was an act on December 16, 1773 that involved a group of men disguised as Native Americans. The group boarded three tea ships docked in Boston Harbor and they destroyed 342 chests of tea.
The Battle of Lexington and Concord was the act that started the American Revolutionary War. It started on April 19, 1775 when the Redcoats were stopped by a group or army of men and the men stared at each other and one person fired and they started a battle.