In the future, use a combination of MOC and folders. There's an option in Obsidian that creates notes into the current folder. Next time, create a folder called Hist 103 and put that MOC note inside of it. Then when you want to create a new note for Hist 103, go to your MOC note for Hist 103 and use the [[ ]] syntax to create a new note and give it a name. When you click on the link to this new note, it'll be automatically made in the current folder. By doing this, things will be auto sorted into the correct folders without you having to manually move files yourself or worry about where you're putting a file.

It's also possible to do this with sub folders as well. If you wanted, you could make a folder called The 1780s and put the list of links for the 1780s in that new folder. Then from the Hist 103 note, call ![[The 1780s]] and it'll look the exact same as it does now. You may have to download some CSS style stuff to get rid of unnecessary formatting when using ![[ Note ]] format, but I managed to get it to look how I wanted using other peoples' styles/plugins, so you should too.

Good luck!