The Anniversary of Battle of Qadesiya

The end of the last Zoroastrian Empire is similar to the end of the First zoroastrian Empire . ironic

It was one of the battles. There were several; this one confirmed the conquest of all of Persia up till the Zagros. 10 years later the Arabs would cross the Zagros and at Nihwand it was curtains for Persia. The battle was not thought of as decisive until at least the rise of Arab Nationalism.

"**sees our Persian friend has missed the point completely"

i.e. worldwide people use to commemorate such events. Plus I'm Iranian, Persians are just a group of Iranian people (the term "Persian as to refer to whole Iranians of iranian stock" is an invention has rose to prominence by mostly pan-Turkist and pan-Arabist guys dating back to the early days of Islamic historiography in order to confine the Iranian people just to Persians, thus making easy wage their cultural wars on them)

About the quality of the battle of Qadesiya, easy way is a search on internet. But as for a professional study you may look up some works which are believed to be the primary sources (Unfortunately there are major defects; the only actual primary sources available today are Islamic arabic sources, which considering to have written in th era of Arab empire, and the fact that they openly are sided with Arab conquest, are not fully trusted)

al-Tabari, al-Dinouri, al-Baladhuri, Yaqut and Hamazah they are some actual starts for primary sources.

"Okay, you are Iranian. Again, you missed the point."

Good job ;) Things should be clear, no?

"overview. Al Qadisiya is the focal point of anguish for the Persians and gloating for the Arabs, in contempory times. 
 
The Sassainds, were outgeneraled by the Arabs. The average grunt probably fought well and bravely, but while Arab leadership at all levels was supereb, the Sassanid leadership was pretty bankrupt."

Hey I guess here we are talking about serious history, aren't we?! 

You are getting it all wrong. Battle of Qadesiya hasn't been an important matter in post-conquest Iran. In fact majority of the Iranians just know a little about it or nothing at all. This is interesting when you compare it with awareness of the Arabs. That means if you ask a random Arab about it you may get more detailed infos than asking an Iranian. So this means actually that this isn't a point of "anguish" (Sparten) for them rather than it seems to be a gloating point for Arabs so that they commemorate their victory even today in their culture. However I have come to see that Pakistanis are also concerned about it.

BUt yet I like yourself also suggest reading that Wikipedia article you put in your post.

Hey buddy that sentence was humorous  not transfering any "Asabiyah" like Arabs use to say, what made you think like that?. By the way I think using hasty words like Mr.Iranian nationalist 2008 may harm the reputation of a moderator.

Zaroastrian Empire?! Iranians unlike Arabs never insisted on such issues even at the peak of Zaroastrianism's power in Iran at the late Sassanian period. Thus such a term never appeared in different historical accounts refereing to Iranian kingdoms and they were always called by the anmes of the ruling dynasties or simply Iran or Persia. So it's natural that this name seem like word-out-of-story for a reader.  But yeah I have heard that Arabs tend to call Iranians even today as "Al-Majus" which is based upon the religious point of view.