Is it true that navy officers in Turkey are not allowed to marry a foreign girl?

As far as I am aware, no Military personnel can marry non-Turkish citizen (also meaning non-Turkish by birth I think).

I could be wrong, that was the last I knew a few years ago.

I don´t know if it applies to retired, or ex-military servicemen and women.

There is no problem with this kind of marriage as my NCO uncle is married to a Bulgarian Goddess

I am sure that this rule does not apply to officers who are no longer in the military because my husband was an officer and I am not Turkish.  I am not sure about currently enlisted officers or if the rules have changed since I was married.  Perhaps it is different for the Navy.   

it`s true. you become a traitor when you marry a foreigner.

 Why is that?  Are they afraid you will release top secret info..

I guess there are similar rules for military workers all over the world.

Military officers have a compulsory job obligation. I not sure how long this is exactly but I guess it is 20 years. They can not leave their job during this time. If they do they will face a very high fine that they can´t pay. Some of the officers realise that the army is not for them but there is no way out. They could consider running away to another country and changing citizenship. A foreign wife is like a visa to a foreign country. Therefore it is not allowed.

I´ve never heard about such rules. Definitely not in Poland. Here, even if you are an officer you´re free to leave the army at any time and/or marry whoever you want

 I believe in the UK, British soilders/military can marry whoever they like from any country.  There is no law against it.