Richard had launched an abortive military attempt to overthrow the Lords Appellant and negotiate peace with the kingdom of France so he could focus all his resources against his domestic enemies.
The losses were a politically sensitive topic and led to a shift in the English position after the death of Edward III, with his successor Richard II favoring peace while many of the landed nobility wanted to continue the war.
The Wonderful Parliament in 1386 blamed the young King Richard's advisers for the military failures and accused them of misappropriating funds intended for the war.
He began to devise a plan to secure his authority over the kingdom by raising an army among his allies and negotiating a secret peace with France so he could focus all his military forces against his domestic enemies.
In exchange, the French agreed to restore most of the Duchy of Aquitaine to Richard, provided he would pay homage to the king of France for it.
[2] In August 1387, to establish a legal basis for overthrowing the appellants, Richard called seven judges of the superior courts to answer a series of questions regarding their legitimacy.
Working with his ally Robert de Vere, Duke of Ireland and Earl of Oxford, an army was raised in Chester and reinforced with royal retainers from East Anglia, the Midlands and eastern Wales.
On 27 December the Lords Appellant's army reached the tower in full battle array and forced Richard to surrender.
The term "Merciless Parliament" was first employed by a local chronicler, Henry Knighton, who was referring to the ruthless manner in which many were convicted and executed.
They levelled a series of charges against Richard's advisers, accusing them of offering to surrender English-held fortresses in France and widespread embezzlement from the treasury.
[10] This meant that a number of Richard's intimate associates, namely Michael de la Pole, 1st Earl of Suffolk, Nicholas Brembre, Robert de Vere, Alexander Neville, and Chief Justice Robert Tresilian, were found guilty of "living in vice, deluding the said king ... embracing the mammon of iniquity for themselves".
[10] The purge continued deep into the administration, dozens of retainers, clerks, chaplains, and secretaries to Richard were summarily condemned and executed.
Thomas Usk (author of The Testament of Love) and John Blake, members of Brembre's and Tresilian's households respectively, were also put to death.
The commanders of the English garrisons in France were replaced with men loyal to the Appellants, who began to pursue an aggressive war policy.
Philip the Bold, Duke of Burgundy, acting as agent for the French government, sent emissaries requesting that the English abide by Richard's agreement, but they were sent away without a reply.
[14] The Duke of York was furious over the treatment of Burley, threatening to break the coalition of lords, leading Gloucester to support ending the parliament.
[16] Richard immediately began formulating plans for revenge and afterwards finally enacted a de facto peace with France with the Truce of Leulinghem.