Oracle bones were once used as medicine before their historical significance was discovered. true or false

True.

Explanation: The "bones of the oracle" or "oracular bones" are relics that are more than 3.000 years old and they date back to the second half of the Shang Dynasty between approximately 1550 and 1050 BC. There are pieces of animal bones and turtle shells used by fortune tellers to make prophecies; It was not until 1899 when academic Wang Yirong (1845-1900) discovered the oracular bones and realized their importance when they were sold as "dragon bones" to which, reduced to dust, they were attributed healing properties.

1) union forces launched a surprise attack.

2) more confederate troops arrived by train.

3) union forces retreated.

the answer would be logic.