Question: Which was released first, Gunner Palace or War/Dance?

Context paragraphs:
Scarff ring: The Scarff ring was a type of machine gun mounting developed during the First World War by Warrant Officer (Gunner) F. W. Scarff of the Admiralty Air Department for use on two-seater aircraft.  The mount incorporated bungee cord suspension in elevation to compensate for the weight of the gun, and allowed an airgunner in an open cockpit to swivel and elevate his weapon (a Lewis machine gun) quickly, and easily fire in any direction.  Later models permitted the fitting of two Lewis guns; while this doubled the firepower available, operation of the paired guns was more cumbersome, and required considerable strength from the gunner, especially at altitude, so that many gunners preferred the original single gun - and this became the postwar standard.  In either case, the mounting was simple and rugged, and gave its operator an excellent field of fire.  It was widely adapted and copied for other airforces.

Gunner Badge: The Aerial Gunner Badge was a military aeronautical badge of the United States Army Air Forces and was issued during the Second World War.  The badge was first created and authorized on April 29, 1943 to recognize both the training and hazardous duty of aerial gunners, who manned defensive machineguns on board such aircraft as the B-17, B-24, B-25, B-26 and B-29 bombers.  The Aerial Gunner Badge appeared as a standard observer badge, upon which was centered a winged bullet.

Gunner Palace: Gunner Palace is a 2004 documentary film by Michael Tucker, which had a limited release in the United States on March 4, 2005.  The film was an account of the complex realities of the situation in Iraq during 2003–2004 amidst the Iraqi insurgency not seen on the nightly news.  Told first-hand by American troops stationed in the middle of Baghdad, "Gunner Palace" presents a portrait of a dangerous and chaotic war.

High School Musical 2: Non-Stop Dance Party: High School Musical 2: Non-Stop Dance Party is a remixed album of the soundtrack, "High School Musical 2".  It was released first in the UK and Southeast Asia on December 24, 2007.  The entire album was available to listen to on Disney X D UK from December 21 to December 23, a day before the album was released.  All of the tracks were remixed by Jason Nevins.  Music videos have been released on Disney Channel for "Bet on It" and "Fabulous".  Although many fans have stated that the back cover's track listing is incorrect, this is not true.  In fact, it only states songs included on the album.  Thus, there is no real track listing to be found.

Michael Tucker (director): Michael Tucker, an American documentary film director, was born in Honolulu, Hawaii.  He is best known for his recent documentary "".  He also directed a documentary in Iraq during the 2003 Iraqi War entitled "Gunner Palace".

Steel Gunner: Steel Gunner (スティールガンナー , Sutīru Gannā ) is a first-person shooter arcade game that was released by Namco in 1990; it runs on Namco System 2 hardware, and was the second game from the company to utilize lightguns (the first was "Golly!  Ghost! ", which was released earlier in 1990 and it was also their fourth game to allow scores not ending in "0").  A sequel, Steel Gunner 2, was released in 1991 and the US version of it was also the second game from the company to feature the Federal Bureau of Investigation's "Winners Don't Use Drugs" screen in the attract sequence (the first was "Tank Force", which was released earlier in 1991) - and it would later go on to feature in five more US-released Namco titles.

War/Dance: War/Dance is a 2007 American documentary film written and directed by Sean Fine and Andrea Nix Fine and produced by Shine Global's Susan MacLaury, a professor at Kean University, and Albie Hecht.  It was nominated for the 2008 Academy Award for Best Documentary Feature and received the Emmy Award for Best Documentary and Best Cinematography in 2010.

Letord Let.7: The Letord (sometimes written as Letort) Let.7 was a military aircraft produced in France during the First World War, as a long-range reconnaissance aircraft, bomber and bomber escort.  They were biplanes of unequal span with prominent and characteristic negative stagger on their wings.  They were powered by twin engines mounted on short struts on the lower wing in tractor configuration, and had fixed tailskid undercarriage.  Many of the subtypes were also equipped with a nosewheel to protect the aircraft and its crew from "nosing over" accidents while landing.  The pilot sat in an open cockpit, with tail gunner in an open position amidships, and a third crewmember in an open position in the nose where he could act as gunner, observer, and bomb-aimer.

Letord Let.1: The Letord Let.1 (also spelled Letort in some publications) was a military aircraft produced in France during the First World War, primarily as a long-range reconnaissance aircraft.  Later versions, designated Let.2 through Let.7 were used in a variety of roles, including bomber and bomber escort.  All were three-bay biplanes of unequal span with prominent and characteristic negative stagger on their wings.  They were powered by twin engines mounted on short struts on the lower wing in tractor configuration, and had fixed tailskid undercarriage.  Many of the subtypes were also equipped with a nosewheel to protect the aircraft and its crew from "nosing over" accidents while landing.  The pilot sat in an open cockpit, with tail gunner in an open position amidships, and a third crewmember in an open position in the nose where he could act as gunner, observer, and bomb-aimer.

Steel Gunner 2: Steel Gunner 2 (スティールガンナー２ , Sutīru Gannā Tsū ) is an arcade game that was released by Namco in 1991; it runs on Namco System 2 hardware, and as the name suggests, it is the sequel to "Steel Gunner", which had been released in the previous year.  The US version was also the second game from the company to feature the Federal Bureau of Investigation's "Winners Don't Use Drugs" screen in its attract mode (the first was "Tank Force", which was released earlier in 1991) - it was also sold as a conversion kit for Taito Corporation's "Operation Thunderbolt" (which was released in 1988 as a sequel to "Operation Wolf", which also used a Yamaha YM2151 FM sound chip, for its effects as well as its music, but it used an OKI MSM-5205 PCM sound chip for speech synthesis, as opposed to a C140).

Supporting paragraphs: Gunner Palace War/Dance
Answer: Gunner Palace