Complex sentence: Flores's losses amounted to around 450 dead and wounded; there are no estimates of the number of civilians who died of famine and disease, nor is it known how much damage was sustained by the national economy.
Split into simpler sentences: Flores's losses amounted to around 450 dead and wounded. There are no estimates as to how many civilians died of famine and disease, nor is it known how much damage was sustained by the national economy.