Every nation uses novel words every time, to avoid parallels. In fact ambassadors have to research every historical speech when a president wants to coin a new term. It’s not rare we hear “He said […], a term not used since [last scuffle between countries]”, journalists do notice.
US has Guantanamo and they don’t call them prisoners of wars (PoW). Russia has special military operations. Australia doesn’t keep their illegal immigrants in detention centers but in “administrative residences”.
So declarations of war are very much not outdated, insofar as everyone _avoids_ those terms.
> declarations of war are very much not outdated, insofar as everyone _avoids_ those terms
One, sure, declarations of war aren’t academically outdated. By that measure neither are colonialism or chattel slavery, which are also avoided in modern speechwriting.
Two, we absolutely say we’re going to war with each other. We just don’t formally declare it. Declarations of war are obsolete, I’d be hard pressed to find anyone serious in government or international relations who claims otherwise.