Complex sentence: Peckover was indignant when she learned that only 200 women belonged to the organization, and began a door-to-door campaign asking for signatories to a Christian declaration against war, with a one penny subscription.
Split into simpler sentences: Peckover was indignant when she learned that only 200 women belonged to the organization. She began a door-to-door campaign asking for signatories to the declaration, with a one penny subscription.