Why did the north have more deaths than the south during the civil war?

The Union had better medical care, food and shelter, especially in the war's final years, suggesting that Southern losses to disease were probably much higher. Also, research has shown that soldiers from rural areas were more susceptible to disease and died at a higher rate than city dwellers.

Explanation: I read it on New York Times.

Shah Ismail conquered Persia in the early sixteenth century and was the founder of the Safavid Dynasty.