CNA designed and conducted a table-top exercise TTX at the U.S. Pacific Command PACOM Amphibious Leaders Symposium PALS in July 2016 that explored seabasing operations and interoperability during future contingency operations. Using a scenario that revolved around a massive natural disaster striking a fictitious country in the southern Indian Ocean, theTTX strengthened relationships and improved mutual understanding among participating militaries. Military leaders from the 22 Asian, Latin American, and North Atlantic Treaty Organization NATO countries participating in PALS formed coalitions, planned how they would operate within these coalitions to provide relief, and assembled their forces to conduct humanitarian assistance and disaster relief HADR operations. PALS participants contributed a broad range of sea-based capabilities and employed them in creative ways. This revealed areas of opportunity and friction that could benefit from discussion at future PALS, dialogue during bilateral military engagements, and inclusion in bilateral and multinational command post and at-sea exercises.