Added pre-1920 Vas county

Amended post-(circa-)1869 borders between Zala, Veszprém and Somogy counties

Added pre-1946 Veszprém county (currently uses 2nd survey boundaries throughout)

Added Habsburg-era Fejér and Komárom counties (currently use 2nd survey boundaries); split Tolna into pre-1850 and post-1860 (to remove Igar panhandle of Fejér)

Added Habsburg-era Győr, Somogy and Tolna counties (currently use 2nd survey boundaries); Closed up 1850-60 Oedenburg district and pre-1849 Trans-Danubianus boundaries

Added Habsburg-era Baranya county (currently uses 2nd survey boundaries); Added basic (incomplete) versions of the 1850-60 Oedenburg district and pre-1849 Trans-Danubianus

Improved/corrected remaining section of Croatia-Hungary border (pre-1918)

Minor border corrections

Corrected admin level of the Karlovac Generalate and added as a subarea of the Croatian(-Slavonian) Military Frontier

Roughly added remaining Croatian Military Frontier districts (I & II)

Roughly added Banal Military Frontier districts (X & XI)

Added various Regierungsbezirke as subareas of the Provinces of Prussia; made a few dates more specific

Added various Kreise as subareas of Regierungsbezirk Marienwerder; added Wikipedia links and Wikidata IDs to said Regierungsbezirk and Kreise

Fixed (Lauenburg-)Bütow

Corrected/improved boundaries along the Vistula/Weichsel roughly between Bydgoszcz/Bromberg and Toruń/Thorn

Cleaned up pre-1793 Poznań and Polish Crown; added as subareas to Polish Crown and Commonwealth

Cleaned up/closed some relations

Added note about missing towns pawned to Poland in Hungarian Szepes/Spiš/Spisz/Zips county (Treaty of Lubowla 1412-03-15 until the Bar Confederation 1769/First partition 1772)

Added 1773-1818 Marienwerder

Removed Duchy of Prussia from Poland-Lithuania after Treaty of Bromberg (1657)