The Wonderful Parliament was an English Parliamentary session of November 1386 which pressed for reforms of King Richard II's administration. The King had become increasingly unpopular in the preceding years due in the main to perceived extravagance to his favourites and the unsuccessful prosecution of the ongoing war in France. Further, there was a well-grounded fear that the King of France was poised to invade England, as he had been gathering a fleet in Flanders for much of the year. Discontent with Richard II climaxed when the King requested a then-unprecedented sum with which to invade France himself. Instead of granting the King's request as he must have expected, the two Houses of the Lords and Commons effectively united against the him and his unpopular Chancellor, Michael de la Pole, 1st Earl of Suffolk. They saw de la Pole as both a favourite who had benefited—unfairly—from the King's unwarranted largesse, and the minister responsible for the King's failures. They demanded the Earl's impeachment.
The King at first refused to attend the parliament; he in fact attempted to dissolve the sitting, to no avail. Richard requested Parliament send a delegation to negotiate with him at Eltham Palace; they, fearing an ambush, sent two Lords instead. One of them, the Duke of Gloucester (Richard's uncle) proceeded to threaten Richard with deposition until the King agreed to return to Westminster and do parliament's bidding. He was forced to sack his unpopular minister and was only allowed to appoint a royal council that was vetted by the Lords and Commons. The King was immensely angry at what he perceived to be an unnatural restriction on his natural right to receive his choice of counsel and appoint his own ministers, and soon left London. He spent much of the following year gathering support in the regions, ignoring his parliament-imposed council, and taking legal advice as to how to overthrow the restraints that constrained his rule. During this time de la Pole was returned to royal favour. Although the King managed to overturn most of the restrictions the Wonderful Parliament placed upon him, within a few years the crisis had resurged, even worse than in 1386, resulting in armed conflict between Crown and nobility, and, eventually, de la Pole's exile and death.
https://en.wikipedia.org/wiki/The_%27Wonderful_Parliament%27_(1386)
Lords Appellant
1387 - Battle of Radcot Bridge
1388 - Merciless Parliament
