Originally posted by vivify
a state formally cooperating with another for a military or other purpose, typically by treaty.
Vivify's attempting to stretch a general dictionary definition to avoid conceding his error.
'Cooperation' does *not necessarily* mean 'alliance', at least *not in a non-trivial sense*.
Indeed, the USA *sometimes cooperates* with about every other country in the world,
such as some humanitarian issues (including public health). So, according to Vivify's
preferred (stretched) definition, the USA must be ALLIED with about every other country.
I would submit that this would make an 'alliance' trivial to an absurd degree.
If the USA cooperated with the DPRK (North Korea) in fighting, say, a deadly virus,
then would that constitute an alliance between the USA and the DPRK?
As an ignorant layman, Vivify also fails to grasp the nuances of language regarding 'alliance'.
During the Second World War, Finland and Germany fought (1941-44) together against the USSR.
So Vivify presumably would conclude that Finland and Germany were 'allies'.
But that's *not* Finland's official position, which is that Finland and Germany were *not*
*allies* (there was no treaty of alliance) but only *co-belligerents* (a legal distinction).