Modern World War created new challenges for countries around the world. Along with advances in technology, warfare tactics and strategies have also undergone drastic changes. Here are some of the major challenges faced in Modern World Warfare and how military strategy adapted to meet them. First, the use of high technology is the main focus in military modernization. Drones, advanced sensor systems, and cyber warfare have changed the way countries operate on the battlefield. In modern conflicts, the ability to gather and analyze intelligence in real-time has become critical. Countries that are able to use this technology effectively can gain significant strategic advantages. Second, the emergence of non-state powers and terrorist groups presents unique challenges. These groups are often not bound by international legal conventions and use asymmetric tactics to cause instability. Countries must adapt more flexible and adaptive strategies to deal with these threats. International cooperation and multilateral approaches are also increasingly important in facing these challenges. Third, conflict in cyber space is becoming increasingly dominant. Cyberattacks against vital infrastructure, government data, or military information can do significant damage without the need for a physical attack. Countries need to develop cyber resilience and good defense strategies. Training and development of human resources in the field of information technology is very important. Fourth, climate and environmental changes also influence war strategy. Problems such as resource scarcity, mass migration, and natural disasters trigger new conflicts. Countries must consider environmental factors in their strategic planning. Strategies that are responsive to climate change can create stability in regions that are prone to conflict. Fifth, information warfare and propaganda have become effective weapons in the modern era. Misinformation and disinformation can influence public opinion and shape perceptions about conflict. Countries must have a strong and successful communication strategy in building a positive narrative, as well as overcome the spread of false information that can damage their image in the eyes of the world. Furthermore, the development of alliances and partnerships is very important in this multicultural era. Countries need to establish good relations with other countries to share intelligence and resources. Global collaboration in security can increase competitiveness and the ability to face common threats in the era of globalization. In addition, training and improving army capabilities must continue to be carried out to anticipate changes in enemy tactics and technology. Investment in military education and integrated training is crucial to ensure that the armed forces remain ready to face a wide range of possible future situations. Modern World War requires countries to think strategically and innovatively. Combining technology with a responsive and peace-oriented foreign policy can produce the stability needed to face the ever-evolving challenges of the modern era.