Which was a disagreement between the Catholic Church and the Eastern
Orthodox Church?

One of the many religious disagreements between the western Roman and eastern Byzantine branches of the church had to do with whether or not it was acceptable to use unleavened bread for the sacrament of communion. The west supported the practice, while the east did not.

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explanation:

were at first enthusiastic in support of the revolution. however, over time divisions of opinion became apparent between federalists and anti-federalists