The following are General Studies materials for History. Given our experience with UPSC, we would suggest you to go through these materials at least thrice. The material we are sharing are all time tested, and they have proved their worth. But one has to know how to use them.
Do not try to mug these materials; rather go for sincere reading while understanding the concepts of these materials for a number of times (read thrice). If you can ensure that, rest assured that you have good command over the subject and you are ready to face questions of this section.
As for History, it is significant both from the point of Preliminary Examination (Prelims) and Mains Examination (Mains). Every year, at least 9 to 10 questions in the list of 100 questions of Prelims are from History, and in case of Mains one can expect questions of at least 50 marks out of 250 in General Studies (GS) Mains Paper 1.