In the early 20th century, I have a connection to Germany, but that isn't much use without more of Europe. The early-mid 20th century has a better connection to Egypt, but that isn't really central to the period. By the mid 20th century, I'm mostly catching up to stuff I've already done.
The finer detail at 5-year periods doesn't start to be useful until about the 1960s-1970s. Reviewing this jogs memories of events I knew about, but didn't pay close attention to. So does working with the 1980s-2000s, where I've been mostly reviewing events in South Asia (India, Pakistan, and Bangladesh). Starting in 1998, I've picked up going on a year-by year basis, but this doesn't have real material until about 2005, and the next few years have been connected to nations at a superficial level well ahead of where I'm working.
At this point, I stopped to review whether any of my files had grown big enough to be worth splitting. A few had. Asiatic history and the History of Western Civilization are both big enough to split, but I need to divide sociology using history and history of peoples first, and they aren't big enough. I did split China history and India history into separate pages. US history is big enough, but not well enough connected to other areas. In the process of working on history, I added another state or two to the US, and another province or so to China, and created a page for names of the states of India.
I also started around to work on connecting other areas to peoples of the world. I added more pages for individuals, but didn't do much connecting, except to India. Areas of anthropology have been connected to Asiatic peoples in general, Oriental, South, and Southeast Asian as well as Anglic peoples. Areas of culture are connected to Latin, South Asian, and African peoples. as a very general level.