Complex sentence: When Davis fled the Confederate capital of Richmond in early 1865, Benjamin went with him, but left the presidential party and made his way to Britain, where he became a barrister, again rising to the top of his profession before retiring in 1883.
Split into simpler sentences: When Davis fled the Confederate capital of Richmond in early 1865, Benjamin went with him. He fled to Britain and settled there, becoming a barrister and again rising to the top of his profession before retiring in 1883.