John Green was a United States cavalry officer who received the Medal of Honor for his bravery and leadership at the First Battle of the Stronghold during the Modoc War.

The First Battle of the Stronghold was the second battle in the Modoc War of 1872–1873. The battle was fought between the United States Army under Lieutenant Colonel Frank Wheaton and a band of the Native American Modoc tribe from Oregon and California, led by Captain Jack.