Complex sentence: Mary Goddard took control of the journal in 1774 while her brother was traveling to promote his "Constitutional Post"; she continued to publish it throughout the American Revolutionary War until 1784, when her brother forced her to give up the newspaper amid an acrimonious quarrel.
Split into simpler sentences: Mary Goddard took control of the journal in 1774 while her brother was traveling to promote his "Constitutional Post"; she continued to publish it throughout the American Revolutionary War until 1784. Her brother forced her to give up the newspaper amid an acrimonious quarrel.