Complex sentence: Afterwards, Doriath was abandoned, the remnants of its people fled to the Havens of Sirion, and the land itself was eventually broken and sanks into the sea along with much of the rest of Beleriand, after the War of Wrath.
Split into simpler sentences: Afterwards, Doriath was abandoned and the remnants of its people fled to the Havens of Sirion. The land itself was eventually broken and sanks into the sea along with much of the rest of Beleriand, after the War of Wrath.