It took the troupe all of one full session ([[Alas Poor History|Story/Story 002]]) to derail the path of history as we know it, as Angelo healed King John of the poison and fever which, historically, killed him (no wrath has been brought upon anyone; it's fine). 

This page represents something of an attempt to keep track of what's happened with history since. 

England 

1216-1220

The First Barons' War rumbles on longer than it originally did, but the miraculous recovery of King John from a fatal disease when a holy relic was restored to him (and the excommunication of Prince Louis by the Pope) conveyed a strong sense to the Barons of 
England that John had divine favour. John's steward William Marshal is able to rally many of them as he did OTL, but without John's death to unite them against the French his army is slightly smaller, resulting in a less successful Battle of Lincoln. The war degenerates into one of sieges, with Dover holding out against Louis long enough that the catastrophic naval defeat at Sandwich causes the French Prince to accept the Pope's offer of mediation and peace is restored to England with John promising men and knights to fight the Cathars in Provence. The resulting English participation in the Albegensian Crusade leads to slightly better relations between England and France in the immediate future. 

1220-1236 

William Marshal's influence on King John (and his example) caused John to have a slightly better understanding of the concepts of loyalty than he did prior to the Barons' revolt, and the issuance of a heavily watered-down version of Magna Carta largely keeps the peace in England for the remainder of John's reign. He is struck down by an illness in the winter of 1235 from which he never truly recovers and dies the next winter, being succeeded by Henry III. 

1236-1250

The early part of Henry's reign is marked with significant conflict between the church and the nobles, with Henry on the side of the former the period becomes a time of ostentatious (but empty) piety, with great stress placed at court on the appearance of holiness. (This turns out to be the influence of a very sneaky demon which the troupe, with assisstance from the archdiocese of Canterbury and the renowned demonologist Gregorius Ex Bonisagus were able to defeat). The conflict almost boils over on several occasions, though the improving economy and the actions of various interested peace parties (including Richard of Cornwall and, ahem, the Order of Hermes) manage to keep a lid on the conflict. 

1250-1267

The weather begins to cool in the 1250s, with a series of wet summers and cold winters leading to failed harvets, famines, and political unrest. Simon de Montfort's rebellion leading to the Second Barons' War begins more or less on schedule and meets with a similar fate to its historical counterpart, though with an (even more) prominent role for Prince Edward in the aftermath; throughout the crisis Edward seemed to be almost the only man in the Royal party the Barons were willing to trust (and nobody particularly seems to care about the whole smash-and-grab on the Templars thing, at least outside of London, which is not as important as it was OTL due to Henry III's emphasising of Winchester). Instead of being named Steward of England as he was OTL, Edward is instead declared Prince Regent in 1267, as Henry's advancing years and general detachedness convince the Barons that he is a holy man but not entirely present on, perhaps, this plane. Henry is celebrated as a devout man and a mystic but actual rulership kind of passes to Edward. 

1267-1273

Edward spends significant amounts of time preparing forces for a campaign against the Welsh Prince, Llewllyn, but it is never launched (except for some intensified skirmishing in the Marches) due to an urgent request from the Pope for reinforcements for the Kingdom of Jerusalem (and his own desire to fulfill his father's vow to take the Cross). His troops instead head on Crusade in early 1273 (see World). 

Europe and Asia (the author is ignoring Africa, America and Australasia because they are unlikely to have much effect on the plot [the Sunset Invasion is turned off] and he knows nothing about their history in this period) 

1216-1230

The longer First Barons' War prevents the French from reinforcing the Albigensian Crusaders in response to Raymond's counterstroke and Pope Innocent's death, and the Cathars are able to reclaim much of the territory they lost in the years to 1215 ahead of "schedule", (resulting in Pope Honorius's much stronger entreaties to the Capetians to quit bickering over the Crown of England and go suppress some heretics already). Papal-Anglo-French bickering over details and logistics delay the countercrusade for some years, but in 1225 the English advance from Bordeaux and the (larger) French contingent from Bourges. They meet stiff resistance, with the Cathars having had several years to fortify their gains. Conversely, the Anglo-French forces are larger than OTL's French-only Catholic counterattack. The result is a gradual, bitter advance, and Beziers is far from the only city where the Catholic commander is alleged to have said that God would know His own. The fighting is therefore similar to the earlier Crusading period of 1209-15, but the brutality of this Second Albigensian Crusade did largely have the effect of suppressing Catharism, resulting in a significantly reduced inquisition (and also a poorer South of France) in the following years. A minor side-effect was a small increase in the size of Gascony; English "wartime" control of strategic fortress-towns such as Marmande ended up lasting for so long - and the French Crown thought sufficiently little of them - that nobody cared when they didn't leave after the Crusade was declared a success in 1230. 

1230-1256

This period is largely as-is; events in the British Isles don't have that much affect on events elsewhere in Europe and Asia - the conflict between the Pope and the Holy Roman Emperor is unchanged, save that Henry III tries to get French support for his campaign in Sicily but fails, and the Mongols overrun Asia and Eastern Europe largely on schedule until 1257.