The Stamp Act Provokes IreAfter Britain won the battle to claim territory west of the Ohio River Valley, they realized the victory also came with a price tag. To defray some of the costs the Stamp Act–a tax on colonists—went into effect on March 22, 1765. The act called for every single piece of paper printed to be taxed. Colonists fought back with riots, protests and secret organizations. One of them, the Sons of Liberty, played a major role in getting the act repealed in March 1766.