The First World War was a world war because it involved many of the world's great powers and their colonies, spanning multiple continents. It was not confined to a single region or country, but rather spread across Europe, Asia, Africa, and the Middle East. The conflict also drew in countries from around the world through alliances and treaties, making it a truly global conflict. The war's impact was felt on a global scale, with millions of soldiers and civilians from various countries participating and being affected by the conflict. **

The Second World War turned from a European war into a world war primarily due to the expansionist policies of Nazi Germany and Japan. Germany's invasion of Poland in 1939 prompted Britain and France to declare war, drawing in their colonies and allies from around the world. Japan's aggressive actions in Asia, such as the invasion of China and the attack on Pearl Harbor in 1941, further escalated the conflict by involving countries in the Pacific and Southeast Asia. The alliances formed between the Axis powers and the Allied powers also contributed to the global nature of the war, as countries from different regions joined the fight on either side. **

A war is considered a world war when it involves multiple countries from different regions of the world. Typically, a world war is characterized by large-scale military engagements, significant global impact, and alliances between multiple nations. The term "world war" is often used to describe conflicts that have a widespread and profound impact on the international community, affecting economies, societies, and politics on a global scale. **

After World War II, the western half of Germany was involved in the economic reconstruction. This area was under the control of the Western Allies, including the United States, United Kingdom, and France. The Marshall Plan, a program of economic aid from the United States, played a significant role in the rebuilding of the western half of Germany, helping to revive its economy and infrastructure. Meanwhile, the eastern half of Germany was under the control of the Soviet Union and followed a different path of economic development. **

After World War II, West Germany was the half of Germany involved in the economic reconstruction. The country received significant financial aid through the Marshall Plan, which helped rebuild its infrastructure and industries. West Germany experienced rapid economic growth and became known as an economic powerhouse in Europe during the post-war period. **

Yes, the First World War is considered a modern war due to the use of advanced technology and tactics that were unprecedented at the time. The war saw the introduction of new weapons such as tanks, airplanes, and chemical warfare, which changed the nature of warfare. Additionally, the scale of the conflict involving multiple countries and resulting in millions of casualties marked a departure from previous wars in terms of its global impact and devastation. Overall, the First World War is seen as a turning point in military history towards modern warfare. **

National football teams see international matches as a world war because of the intense competition and national pride at stake. These matches are a chance for countries to showcase their talent and compete on a global stage, similar to the way nations would compete in a world war. The passion and fervor surrounding these matches can be likened to the intensity of a war, as fans and players alike are deeply invested in the outcome. Additionally, the historical rivalries and political tensions between nations can add to the significance of these matches, making them feel like a battle for supremacy. **

The 30 Years' War is not considered a first world war. While it was a major conflict that involved many European powers and had far-reaching consequences, it was primarily focused on the Holy Roman Empire and its surrounding regions. The term "world war" is typically used to describe a conflict that involves multiple major world powers and has a global impact, which does not fully apply to the 30 Years' War. Additionally, the concept of a "world war" as we understand it today did not exist during the time of the 30 Years' War. **