The Fourth Crusade

There isn't hardly anybody who still hasn't heard about the "Crusades" - famous military expeditions, organized in the period 1096-1270 by the Raman Catholic Church in order to liberate the Holy Sepulchre (Jerusalem) and the Holy Places (Palestine) from the false Moslems. Unfortunately the official "aim" was often ignored during the Crusades and there were involved political influences and interests of the central European forces. The most telling example for that was the 4. Crusade (1202). French, Flamand and German knights assembled in Venice, from there they had to be transported by the navy to Jerusalem. But they attacked and plundered the Adriatic town Zara at the insistence of the inhabitants of Venice, who "aim"ed at the destruction of their trade rival and at the Mediterranean Under the great influence of the pope in Rom of that time - Inokentios III, the knights got little by little in front of Constantinople - the capital of the world known Byzantine Empire, where the residence of the so called Universal Patriarch was, who possessed absolute power over all the East-Orthodox peoples. But the papacy in Rom had the ambition for a predominant power over the Christians all over the world. That's why the existence of Byzantium and in particular Constantinople wasn't to his interest. It went so far that the crusade forces took Constantinople (13 of April, 1204) Byzantium was patitioned and there was created in the capital and in the near surroundings the Latin Empire of Baldwin I. of Flanders. Concerning of the taking of Constantinople the Byzantine chroniclers wrote that even the pagan barbarians weren't so cruel as the brothers Christians. The reports proved that the town was put to a wild devastation on the part of the crusaders.
Byzantium bordered to the North on the mighty Bulgarian state. The Empire had in its face a centuries old powerful military enemy. To the time when the Byzantine capital was taken by the crusaders , on the Bulgarian throne reigned king Kaloyan (1197-1207). By the newly established situation Kaloyan regarded as reasonable the creation of good neighborly relations with the Latins and sent a letter to Baldwin of Flanders with an offer for a peace. But the Emperor rejected it and made unfounded territorial demands to Bulgaria under the pretext that the lands belonged to the ex-Byzantine Empire.