Final answer:
Marine Corps leaders face challenges with social media primarily related to communication breakdowns, including the risk of misinformation, operational security, and maintaining discipline and professionalism among service members.
Step-by-step explanation:
Marine Corps leaders face several dilemmas when dealing with social media, but the most pertinent issues concern communication breakdowns. Social media can lead to the rapid spread of misinformation, which may endanger operational security or cause confusion among personnel and the public. Leaders must carefully balance the need for transparency and effective communication with the risks associated with sharing too much information on platforms that are accessible to adversaries. Furthermore, social media can impact the discipline and professionalism of service members if not used appropriately. Maintaining the privacy of military operations while engaging in the digital landscape presents unique challenges for Marine Corps leaders.