Are there any border irregularities in your nation (places where your nation's international boundary is an incursion into another nation's territory)? Any exclaves? Any enclaves other nations have?
Romalae has agreements with the northern and southern nations that whenever the rivers that separate them change course, the incorporated land can temporarily cede into whichever nation's territory it crosses into. This agreement made it difficult for people to own property right by the rivers without having their nationality changed on them whenever geography pleased. Further agreements were made where owners of property by the rivers could decide which nation they wanted to remain in/be incorporated into. Conflicts are now rare. Border crossings where customs agents are are protected against occasional river changes.
A small portion of land on Romalae's northern border with Havanu is on Havanu's side of the river, and the occasional river changes do not affect this portion of land. At the time this border was agreed upon, this area was a government-designated wildlife area, and Romalae did not wish to give it up to Havanu. The portion of land is currently respected by both nations and has no permanent population.
On Romalae's eastern border with Paursia, one of the mountains along the Lansch Mountain range included a small ledge that barely crossed the line into newly declared Paursian territory, by not even three meters. Paursia had just become independent from Romalae, and a newly signed extradition treaty between the two had four days left to come into effect. During this time, a criminal on the run from Romalae was being pursued in the region. His path across the border to Paursia was blocked by a small creek, and he didn't have enough time to cross it. Instead, he trekked up a small distance on the base of the mountain and noticed the ledge. He ran to the very edge of it and waited for his pursuers to catch up. When they did, he claimed to them that he was in Paursian territory, and thus unattainable by Romalan authorities. Briefly surveying the land themselves, with knowledge of the new borders, the Romalan authorities realized that he was indeed within Paursian territory. The criminal waited on top of the ledge for two days, until a Paursian surveyor came across him and took him onto the mainland. When the extradition treaty came into effect, the criminal was recognized, captured, and imprisoned in Romalae. The ledge became a popular tourist site, and was named after the criminal who used it as an excuse not to be arrested. After years of weathering, it finally fell apart in 1967.
