Please hurry and thank you

For medical practitioners in the field during the Civil War, germ theory, antiseptic (clean) medical practices, advanced equipment, and organized hospitalization systems were virtually unknown. Medical training was just emerging out of the “heroic era,” a time where physicians advocated bloodletting, purging, blistering (or a combination of all three) to rebalance the humors of the body and remedy the sick. Physicians were also often encouraged to treat diseases like syphilis with mercury, a toxic treatment, to say the least. These aggressive “remedies” of the heroic era of medicine were often worse than patients’ diseases; those who overcame illness during the war owed their recoveries less to the ingenuity of contemporary medicine than to grit and chance. Yes I think that the battlefield medicine has improved.

Explanation:

SORRY I AM NOT SURE IF I CAN EXPLAIN IT AND IF MY ANSWER IS RIGHT!

a drastic rise in oil prices ended decades of postwar.