Studying history is essential for success in the UPSC Preliminary and Main Exams. The preliminary exam under the history portion covers India during ancient, medieval, and modern times. The UPSC Mains Exam will include certain themes from world history.
The UPSC Mains Examination World History syllabus contains events from the 18th century. If you wish to do well in this subject, you need to have a solid understanding of world history. Aspirants will benefit from studying world history in General Studies Paper 1 and knowing more about it in General Studies Paper 2.

We must understand the fundamental principles included in the UPSC-established Syllabus. We should also be aware that not everything that happened after 1700 is recorded in world history. It should also be noted that current events, particularly prospective subjects heavily influence debates. In this scenario, vital news may include the American Revolution.
How to Prepare the History Syllabus for UPSC

It is recommended that you thoroughly review the UPSC history curriculum because a large amount of the subject is shared across the prelims and mains. When preparing a history subject, the following technique may be valuable to you:
1 Cover the topic according to the syllabus.
Following the curriculum will allow you to learn about historical events in chronological sequence. Stick to the curriculum, especially for this topic. perusing just the portions that are relevant to the UPSC CSE curriculum is essential, even while perusing reference books. The UPSC history syllabus is extensive, hence it must be rigorously followed when studying for the mains test.
2 Mock Tests
Write as many practice examinations as possible while properly learning this content. Write example answers for the mains and have your mentor score them so they can see how well you prepared and where you went wrong. Keep repeating the process!

3 Establish a solid foundation.
To create a firm historical basis, read the NCERTs for Classes VIII through XII. Reading NIOS/IGNOU notes will help you better comprehend the material. The NCERTs' brief summaries of content must also be read, as direct questions based on them will be asked in the Prelims.
4 Look through the PYQs
Your comprehension of the questions posed will increase as a consequence. It will also help you increase the effectiveness of your preparation strategy. In addition, you may search the information pool for material that addresses particular queries.
How to prepare for World History.
1. It is recommended that this portion be handled with a broader perspective than the Indian History segment because the UPSC Mains test does not include less unimportant World History topics.
2. Avoid being extremely strict in your ideas, but always examine data and facts and always find links between causes and effects.
3. During the global history test preparation, the candidate should cultivate a critical thinking mindset. You should be familiar with a variety of historical circumstances and occurrences.
4. It is recommended that candidates practice generating hypotheses as they prepare for the UPSC Mains World History section of the exam, as this will help them not only answer questions on that section of the test, but also on many other topics where critical thinking skills may be tested.
5. When answering questions regarding world history, retain a holistic viewpoint.
6. The candidate's comments should be backed up with crucial data and logic. This would allow them to attain the appropriate outcomes for the relevant queries.
7. In addition to the foregoing, all candidates must face the hard realities of preparation, such as the tedious nature of the process, the necessity for pure devotion, dealing with self-doubt, and having the goals in mind at all times.
8. Embrace Monotony: Accepting the monotony of your everyday routine is the most overlooked component of preparation. You must be constant in your preparation for the exam, working on it every day and week. To prevent derailing your own preparation, attempt to make a plan for the following week or two.
9. Ensure devotion: UPSC requires complete dedication, thus become dedicated. Just bear in mind that while your friends and acquaintances have fantastic experiences, your life will become mundane and dull. You can play a lengthy game with your family and friends, but deep down you know you've been genuine. That is what will eventually define your success in the undertaking.
10. Remember your aim. Your life will become mundane and dull while your friends and acquaintances have fantastic experiences. Maintain your composure and focus on passing this test. You will have to postpone everything else in life. Keep out anybody and anything that might be a nuisance. Once you reach that level, you may readily accept an apology.
11. Dealing with self-doubt: Despite all of the heady language mentioned above and convincing yourself every morning that you are a superstar, the feeling of self-doubt might sneak in. It will appear at any time, between your most ecstatic and vulnerable moments, and will ask you what happens if you do not make it. You will not have an answer to provide.

Overall, for history section, it is better to concentrate on taking notes. Analyze the previous year's questions very well and try to picture out how UPSC asks the question. However, don't underestimate the importance of revision, since it allows you to learn everything precisely. Best of luck.