Upvote:2
Because historical events are normally related to each other and the timing is important, for example think of the October Russian revolution of 1917, do you think it is a coincidence that the very same year there was the Feb revolution, or that at that time WWI was happening (1914-1918), also you need to consider the Russian revolution of 1905.
The same can be said of the French revolution and the arrival of Napoleon or the discovery of America and the Spanish Empire, timing is important, very important.