The French Police issued a photograph of a French national allegedly connected to the Islamist group that killed 129 people in Paris.
A series of coordinated terrorist attacks consisting of mass shootings, suicide bombings, and hostage-taking occurred at various locations in Paris.
Brussels-born Salah Abdeslam, the key suspect named by the police, reportedly rented the Volkswagen Polo believed to have been used by the attackers.
The officials revealed him to be one of the three Belgium-based brothers linked to the attacks.
The remaining five gunmen and suicide bombers were killed during assaults in the country.
UK Prime Minister David Cameron unveiled plans to invest around £178bn in defence equipment and support over the next ten years.
Around £12bn was to be spent on nine new Boeing P8 maritime patrol aircraft for maritime surveillance, anti-submarine and anti-surface ship warfare.
The funding will also be used to expand the life of Typhoon through to 2040, creating two additional squadrons.
Two senior senators reportedly urged the US Federal Government to expand military forces in the fight against Islamic State of Iraq and Syria (ISIS).
Senate Committee on Armed Services chair John McCain and member Lindsey Graham criticised US President Barack Obama's incremental strategy to defeat the terrorist group through airstrikes and assisting local forces.
About 3,500 US troops were advising and assisting Iraqi forces against ISIS.
In addition to US soldiers, McCain called for 100,000 foreign combatants, with most coming from Sunni countries such as Egypt, Turkey and Saudi Arabia.
The US Armed Forces, Lockheed Martin and Missile Defense Agency (MDA) completed the ballistic missile defence system's (BMDS) multifaceted operational test at Wake Island and in surrounding areas of the western Pacific Ocean.
The flight test was conducted jointly by the MDA, BMDS Operational Test Agency, Joint Functional Component Command for Integrated Missile Defence, US European Command, and US Pacific Command.
Known as Flight Test Operational-02 Event 2 (FTO-02 E2), the test involved the terminal high-altitude area defence (THAAD) weapon system, the Aegis Ballistic Missile Defense System (BMDS), the US Navy's third Arleigh Burke-class guided missile destroyer USS John Paul Jones (DDG 53), an AN/TPY-2 radar, and the command, control, battle management and communications (C2BMC) suite.
The UK entered into an agreement with France to develop a new generation of missiles.
The deal was to allow the countries to share certain MBDA-developed technologies in future missile development.
Technologies used in Sea Venom, a helicopter-launched anti-ship weapon, was to be part of those shared under the agreement.
The technologies will also be used in future national and joint programmes to meet British and French military requirements.
South Korea's Defense Acquisition Procurement Administration (DAPA) reportedly announced the rollout of Boeing's AH-64 Apache attack helicopters for the Republic of Korea (ROK) Army.
Yonhap News reported the helicopters were 'unveiled months before the start of deliveries' by Boeing in Mesa, Arizona, US.
Speaking to Yonhap, DAPA aviation business team head Baek Yoon-hyeong said: "The Apache Guardian will greatly contribute to the strengthening of our military's combat capability by replacing aging helicopters currently in operation."
DAPA officials said that the US Army will conduct test flights before delivering the helicopters to South Korea in early 2016.
Amnesty International and Human Rights Watch (HRW) blamed the Saudi Arabia-led coalition for a missile attack on a Yemen ceramics factory.
The attack on the Radfan factory, which produces civilian goods, killed one person and violated International Humanitarian Law (IHL).
The airstrike occurred on 23 September in the village of Matna in the Beni Matar district, west of Sana'a.
The strike, which used a UK missile supplied in the 1990s, sabotaged claims that the Saudi Arabia-led coalition's use of UK military equipment is consistent with IHL, and that the UK monitors compliance with the law carefully.
UK Prime Minister David Cameron announced a new £2bn programme of investments to combat terrorist group ISIS.
The decision came after the G20 summit, which mainly focused on the attacks in Paris, France, that killed more than 130 people.
The extra investment was to be used to double the military's existing drones fleet, purchase more fighter aircraft, and increase special forces' capabilities.
The country will continue to maintain a nuclear deterrent at sea, and invest in new cyber defence systems to block attacks.
The US Defense Security Cooperation Agency notified Congress of a potential foreign military sale (FMS) of Stryker infantry carrier vehicles (ICV) to Lithuania.
Under the $599m sale, Lithuania requested 84 M1126 Stryker ICVs and 84 M2 Flex machine guns.
The Stryker ICV system would provide manoeuvrability, speed, and firepower to the Lithuanian Land Forces, and enhance its ability to contribute to territorial defence and Nato operations.
The Indian Army's Strategic Forces Command (SFC) successfully test-fired two nuclear-capable missiles.
The Prithvi-II missile was tested from an integrated test range (ITR) in Chandipur near the Odisha coast.
Powered by solid propellants, the surface-to-surface Agni-I missile was test-fired from an ITR mobile launcher at Abdul Kalam Island.
Conducted as part of SFC training exercise, defence sources noted the trial to be a 'perfect launch'.