Final answer:
The information provided does not specify the exact date when Richard the Lionheart's army began its slow advance on Jerusalem during the Third Crusade. Richard's campaigns included the conquest of Cyprus and some coastline of the Holy Land, but the advance on Jerusalem resulted in a treaty, with the city remaining under Muslim control.
Step-by-step explanation:
Richard the Lionheart's Advance on Jerusalem
The historical event in question refers to the Third Crusade (1189-1192), led by Richard the Lionheart among other European monarchs, with the objective to retake Jerusalem and bolster Christian presence in the Holy Land, particularly the Crusader States of Outremer.
The crusading armies, struggling with internal squabbles and limited by their inability to move further inland, were ultimately unable to capture Jerusalem, leading Richard to negotiate a treaty with Saladin.
This agreement allowed Christian pilgrims to visit Jerusalem which remained under Muslim control.
The specific date when Richard's army began its slow advance towards Jerusalem during the Third Crusade is not clearly stated in these excerpts or generally well-documented, resulting in a need for further historical research for precision.
Although Richard I was involved in military campaigns during the Third Crusade, the exact timing of his advance on Jerusalem is not detailed in the provided texts.
The campaigns of the Third Crusade included the conquest of Cyprus and portions of the Holy Land coastline, but eventually, the crusaders' efforts were halted, and a treaty was negotiated.