3 ms·
as the wiki article linked suggests, there are numerous possible reasons, including eruption of Hekla in Iceland and subsequent mini ice age -> famine -> wars f
by saiya-jin 10y ago
as the wiki article linked suggests, there are numerous possible reasons, including eruption of Hekla in Iceland and subsequent mini ice age -> famine -> wars for scarce resources. Or many other possible reasons, all just educated guesses at best