"None of the relevant military forces met their required deployment timelines," the report stated.
The 2012 terrorist attack in the Libyan port city of Benghazi killed US Ambassador Christopher Stevens and three other Americans.
The Republicans argued that one of the platoons arrived to the Libyan capital Tripoli almost 24 hours after the beginning of attacks.
"When the Secretary [then-Defense Secretary Leon Panetta] identified a FAST Platoon as an asset to deploy and said ‘go,’ one US facility in Libya had already been attacked, Sean Smith had been killed, Chris Stevens was missing, and the US Embassy in Tripoli was facing threats of another attack," the report said.
Republicans accuse the Obama administration of covering up its incompetent response to the attacks, while Democrats view the Benghazi Committee’s work as political theater intended to embarrass the administration.