Depends on the time period considered.
From the break-up of the Scandinavian Kalmar union in the early 16th century, Denmark's main adversary was Sweden which made Russia the main ally for centuries.
In the 3o year war Denmark was on the protestant side, which would make England and Holland the main allies (supplying the finances for the hired army).
During the survival struggle in the 1660 Holland was an alley without which Denmark probably wouldn't have existed today.
In the Napoleonic wars Denmark was initially allied with various neutral Baltic countries (primarily Russia) trying to avoid having to side with neither France nor Great Britain. Eventually Denmark was forced to side with France.
Denmarks best midfielder is Ramadhal.
Denmarks famous butter is known as Lurpak.
Europe
Evangelical Lutheran
Greenland
Copenhagen!
NilFisk
Poppy's
A Kroner
36
Copenhagen.
Danish