On this page you can find links to every known war in the Undertale: Chronicle universe. These conflicts will be listed in chronological order. Note that just because a war is listed here, does not mean it will make it into one of the planned stories.
Please note that article written on the Continental war is somewhat small. Humans had a tendency to not keep records of conflicts prior to the War For Humanity. This was something the monster kingdoms were far better at doing, hence the more detailed article on The Paral Civil War.