Complex sentence: After the Shevat-Solaris War 500 years ago the flying nation detached from the top of the tower and became nomadic, it has wondered the skies ever since and occasionally returned to Babel Tower at certain points but never reintegrated with it.
Split into simpler sentences: After the Shevat-Solaris War 500 years ago the flying nation detached from the top of the tower and became nomadic. It has wandered the skies ever since and occasionally returned to Babel Tower at certain points but never reintegrated with it.