According to a Belgian news report (July 5),  The night of the attack at the Paris Bataclan, November 13, 2015, six French military personnel of the Sentinelle Project (launched by France's Ministry of Defense) were at the entry of the concert hall.

They did not intervene because the circumstances [pertaining to the Bataclan attacks] did not meet their "rules of engagement", according to cdH [Political Party] Member of Parliament (Député) Georges Dallemagne in a Tuesday morning statement [July 5] on Belgium's RTL TV."

An early report by Nouvel Obs (May 6, 2016), confirmed that there were 8 military personnel. They outnumbered the four alleged terrorists inside the Bataclan. If they had intervened, this would have saved lives. It is unclear from the report as to time at which they were stationed in front the nightclub.

Military personnel invariably obey orders from higher up. The question is: Who instructed them not to come to the rescue of people inside the nightclub? Was it the Police or the Ministry of Defense? According to Nouvel Ops: The  military of the Sentinelle force did not have the green light to use their weapons.  "The victims will be rescued later, without the support of the Army" (translated from French).

It is worth noting that the 4 alleged terrorists were known to the police. It was also confirmed that there was foreknowledge of the November 13, 2015 attacks.

According to the New York Times: "Most of the men who carried out the Paris attacks were already on the radar of intelligence officials in France and Belgium",