Complex sentence: As part of Gabriele Maria Visconti's dominions after 1399, Pisa was then sold to Florence in 1402; after a bloody and useless resistance, the municipality was at last subjected in 1406.
Split into simpler sentences: As part of Gabriele Maria Visconti's dominions after 1399, Pisa was then sold to Florence in 1402. After a bloody and useless resistance, the municipality was at last subjected in 1406.