en.wikipedia.org/wiki/Joscelin_I,_Count_of_Edessa

This sentence overstates Zengi's success after the Aleppo succession crisis.

What the sources support is:

• Zengi became ruler of Mosul and then Aleppo in 1127–1128.
• He wanted Damascus, but never secured it.
• Damascus remained under the Burid rulers and was not taken over by Zengi himself.

Britannica's biography of Zangi says that his "immediate goal" was to secure Damascus, but explicitly adds that this was "a goal he never achieved." Encyclopedia.com's Damascus entry likewise says that Tughtaqin's successors, the Burids, ruled Damascus until the last Burid ruler was supplanted by Nur al-Din in 1154—that is, by Zengi's son, not by Zengi in 1129.

So the article is wrong to say Zengi had become master of Damascus by 1129. He had consolidated power in Mosul and Aleppo, but not Damascus.

This repeats the same historical error later in the article.

Reliable reference works distinguish between Zengi's control of Aleppo and his failed efforts to gain Damascus. Britannica says Zengi's immediate aim was to secure Damascus, but that this was "a goal he never achieved." Encyclopedia.com's Damascus entry says the city remained under the Burids until 1154, when it was taken by Nur al-Din Mahmud, Zengi's son.

So it is inaccurate to say Zengi had established effective control of Muslim Syria including Damascus. He was a major power in northern Syria, especially through Mosul and Aleppo, but Damascus was not under his control.

This date compresses two different events into one and ends up misstating both.

• The city of Edessa fell to Zengi in 1144, not 1146.
• The remaining remnants of the County of Edessa survived after that and, according to Encyclopedia.com, fell only in 1150.

So saying that the County of Edessa was conquered in 1146 is inaccurate. The year 1146 is associated with Joscelin II's brief recapture of the city and its rapid loss again, not with the initial fall of Edessa in 1144 or the final loss of the county's remaining lands in 1150.