China and Russia have the most neighboring countries, with 14 each.
The estimated population of England in 1550 was around 3 million. In contrast, the estimated population of Scotland in 1550 was around 0.5 million.
China and Russia. They both share borders with 14 countries, you then also have places like Brazil, China, France, Germany etc. who are the next largest bordering countries
The smallest bordering country of Russia is Lithuania, with a border length of 227 kilometers.
Augusta is the capital city in the U.S. state of Maine, the state bordering New Brunswick Canada.
Austria, France, Vatican City, San Marino, Slovenia and Switzerland bordered Italy in 1550- 1700 CE.
Neighboring nations (bordering countries).
England, and only England.
Syria
UraguayParaguayArgentinaBoliviaPeruEcuadorFrench GuianaSurinameGuyanaVenezuelaColombia
manks
England
Belgium, Luxemburg, Germany, Switzerland, Italy and Spain
The bordering countries of Laos & Cambodia were neutral.
Spain, United Kingdom, France, Russia/USSR.
balance of power
The nations bordering Austria are: Switzerland, Germany, Czech Republic, Slovenia, Hungary, Slovakia, and Italy. I did not see your original list so I listed all the bordering countries.