How many campaigns were there during the crusades?

There were a total of nine major Crusades from the late 11th century to the late 13th century. The most notable are the First Crusade (1096-1099) and the Third Crusade (1189-1192). In addition to these, there were several other campaigns and lesser-known expeditions, such as the Children's Crusade in 1212. Overall, the Crusades spanned nearly two centuries, reflecting a complex series of military and religious conflicts.