In general, we prefer to use internal links within Wikipedia, so many of our articles will link to our own Cold War article rather than to external sites dealing with the cold war. It is not appropriate, for example, for our Angola article to link to an external website on the cold war, no matter how good it may be, even though the history of Angola was unquestionably hugely affected by the cold war. The only external links on the Angola page should be to sites which are directly about that country. 

 The cold war article, similarly, should have external links only to articles directly relevant to it. Your website certainly seems to qualify, and so I don't expect the link to be removed again. It was removed the first time only because it was also put on many other pages.-