"Henry V" and "Richard III" seem to be the most popular history plays of Shakespeare. But I myself lean towards this one. The play starts with the wedding of King Henry VI and Queen Margaret. At this point in the war between France and England, France has gained the upper hand, but England does still control Calais, Anou, Maine, Normandy, and some areas around Bordeaux. Well, the virtuous Gloucester (and the only remaining son of King Henry IV) is shocked that Anjou and Maine have to be returned to france as well. This angers York, and he thinks this is just reason to act on his claim to the crown. (In history, York was VERY LOYAL to Henry VI, and it was SEVERAL things including some threats from Margaret that made him take up arms.)

Moving on, we later see that Glouceter's wife has her eyes on the crown. Meanwhile, Margaret is growing weary of King Henry VI, and her affair with Suffolk becomes more prevalent. Act 1 ends with the dramatic scene of Pagan Prophecies and Lady Glouceter's arrest.

Act 2 begins with the comical scene of the false miracle. Though the comedy breaks when Gloucester learns of his wife's treason. York gathers his alies Salisbury and Warwick and plans his moves to seize the crown. In one of his stronger moments, King Henry VI orders the execution of those who plotted against him. Though he is smart and treats Lady Glouceter more gently. (Public Penance)

Later, we learn that England has lost all of its land in France. (Thoughin history they still held Calais, and would continue to do so even in the later reigns of King Henry VIII and his son Edward VI.)

Moving on, York, Somerset, the Cardinal, Suffolk, and Queen Margaret all accuse Gloucester of treason. He defends himself with dignity, but is arrested. King Henry VI is often rebuked for his weakness here, but he does recover to banish the vile Suffolk. Perhaps one of the greatest scenes is 3.3 when the Cardinal dies in the midst of insanity (quite possiblyover the guilt of Gloucester). Yet King Henry VI forgives him: "Forbear to judge, for we are sinners all."

Act 4 is dominated mostly by the rebel Jack Cade. He has launched an uprising against the king, and is quite theatrical and offers some comical moments. He gets far, but is eventually defeated by Buckingham and Clifford. Cade escapes, but is soon killed by Iden.

Onto the final act. York returns from Ireland in arms, but Buckingham convinces him that King Henry has consented to his demands and imprisoned Somerset. This proves not to be, and York and his sons Edward and Richard take up arms, and the war begins. York does gain the advantage here, but things aren't over. King Henry VI and Margaret escape. And Young Clifford finds his father killed by the Yorks. (And now Clifford wants revenge.) This passage on revenge combines hatred, beauty, and sorrow well.

Overall, this is arguably the strongest of the history plays.