The navy of a Hungary-Croatia-Slovenia union

What would the navy of a unified Hungary, Croatia, and Slovenia look like in 2025?

The state would probably give its army priority and keep a modest navy of frigates and diesel-electric submarines, relying on Italy for much of the Adriatic mission if it belonged to NATO.

Croatia supplies the meaningful coastline, Slovenia adds only a small frontage around Koper, and Hungary remains connected principally through the Danube. The combined state would also face extensive land borders with several Balkan and eastern European neighbors. Defense spending would therefore favor the army over an ambitious blue-water fleet. Its navy would probably consist of a few frigates, diesel-electric submarines, and supporting craft suited to Adriatic operations. If the union remained in NATO, Italy would carry much of the alliance's larger naval burden in the region.