As a Polish intelligence officer from the Służba Bezpieczeństwa specializing in sabotage and subversion, he seemed perfectly suited to oversee the unit's initial formation.

The first batch of recruits all came from a variety of already-existing special units within the Polish Armed Forces.

Before October 1, 1999, JW 2305 was subordinate to the Ministry of Internal Affairs, after which time command was transferred to the Minister of National Defence, until 2007.

[7] For the 2003 invasion of Iraq, GROM formed the part of the core of the Naval Special Operations Task Group, along with US Navy SEALs, British Royal Marines and attached US Psy Ops and civil affairs teams.

Iraqi troops guarding the dam surrendered without a fight, there were no casualties to the team (with the exception of one GROM soldier, who broke an ankle during the insertion from a US Air Force MH-53J Pave Low helicopter.

[10][11] SEAL and GROM units continued to cooperate throughout the rest of the invasion phase, with raids and anti-sniper missions in Baghdad.

In September 2004, US Navy SEAL sniper Chris Kyle was temporarily assigned to GROM's Combat Team B in Baghdad for a week.

The CIA reportedly found GROM snipers useful due to their low rules of engagement threshold.

[13] In 2007, US Army Special Forces, Polish GROM conducted Operation Jackal against insurgents in Diwaniyah.

[14] In 2007, GROM and JW Komandosów were deployed to Kandahar (after earlier successful tours of Iraq operating alongside US Navy SEALs) under direct US Command.

Along with Direct Action successes, they were considered very effective in training and mentoring Afghan National Police units.

Green deals with field reconnaissance, deep cover sabotage, population extraction/evacuation, and elimination of personal threats.