This can actually be attributed to the ambition of the Island Nation in developing military strength. When the Island Nation developed its modern military power, it referred to the development of the British navy and the French army.
The problem is, these two countries are completely different in terms of their army and navy. One advocates heavy emphasis on the navy and light emphasis on the army, and the other advocates heavy emphasis on the army and light emphasis on the navy.
It is unusual that the Island Nation's army and navy would not be influenced by these two military development ideologies and would be able to see eye to eye.
In peacetime, such a situation may not be a big deal. After all, the military budget of the Island Nation can still be guaranteed, and it's just a matter of one party suffering a little loss, and then grabbing it back the following year.