Personally, I think the military mainly includes three aspects, military theory, advanced weapons and elite troops. These three aspects, whether in military attack or in strategic defense, are extremely crucial. The first is military theory. Mao Zedong, a military strategist, absorbed the essence of previous military theories, created and developed them through War of Resistance against Japanese Aggression, the War of Liberation and the War to Resist US Aggression and Aid Korea, and formed Mao Zedong's epoch-making military ideological theory. This theory not only contains rich operational methods, but also is full of philosophical color. Its correctness, advancement and guidance are worthy of our in-depth study and experience, and combined with specific conditions to develop and improve. This kind of thinking made me deeply realize the wisdom of human military theory. Secondly, it is advanced weapons. With the development of the times, the scientific and technological content in weapons is getting higher and higher, which has a greater impact on the outcome of the war. Military weapons even played a decisive role in several wars this year, such as the Gulf War, the US air strikes against Yugoslavia and the US occupation of Iraq. Despite the unremitting efforts of several generations, China's weapons and equipment have made substantial progress. So I think our country should step up efforts, increase investment and focus on developing new weapons. This will have a very favorable impact on national defense deterrence. Finally, the elite troops. With the development of science and technology, modern technology is more and more widely used in the military field. Most wars no longer rely on the number of people, but on the quality of people. Exquisite and superb military combat ideas need people to use and create; Advanced and dexterous new weapons need people to develop and use them. I think for the army, we should pay attention to the quality of soldiers while paying attention to a certain number. Therefore, we can organize our army with a certain number of elite standing armies and huge reserve forces. Through the study of military theory, I have strengthened my patriotic enthusiasm and strengthened my national defense concept. Every time I concentrate on listening, I still feel that I haven't heard enough. The teacher told us about the form and present situation of China's national defense, which enabled us to learn a lot of modern military knowledge, realize the close relationship between national defense and national security, the rise and fall of national honor and disgrace, improve our understanding of the status and role of national defense, and establish a solid concept of national defense. "Although the world is safe, it will be dangerous to forget the war" and "born in sorrow and died in happiness" ... These old sayings tell us that the more peaceful the times are, the more we must be prepared for danger in times of peace and strengthen our national defense awareness! Every country and nation starts from its own security and applies its latest scientific and technological achievements to national defense. By learning modern military scientific knowledge, college students can personally feel the application of their majors and knowledge in the military field, which greatly stimulates their enthusiasm and consciousness of learning modern scientific and cultural knowledge and enhances their consciousness of bravely challenging difficulties and climbing scientific peaks.