Complex sentence: A total of 19 men have been awarded the Medal of Honor twice, 14 of these received two separate medals for two separate actions, while 5 received both the Navy and Army Medals of Honor for the same action.
Split into simpler sentences: A total of 19 men have been awarded the Medal of Honor twice. Fourteen of these received two separate medals for two separate actions, while five received both the Navy and Army Medals of Honor for the same action.