
- BGG rank
- BGG #12,787
- BGG rating
- 7.3
General Quarters
- 90–240 min
- Complexity 2.3/5
- 1975

Rules assistance for Sudden Storm: Japan vs. US, 1937
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

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Answers come from the official rulebook, with the page to check.
Sudden Storm: Japan vs. US, 1937 is an expansion for General Quarters (Third Edition) released in 2011 for 2–12 players, 120 minutes per game, and ages 12 and up. It was designed by Gregory Kuntz and L. L. Gill and its main mechanics are Simulation and Scenario / Mission / Campaign Game.
Sudden Storm is a fast moving campaign of the 1937 naval war between Japan and the US recreating the full range of surface, air and submarine warfare in both operational and tactical operations. It enables you to explore the challenges admirals on both sides would have faced if the US and Japan had ended up at war in August 1937, during the "China Incident," rather than in December 1941. A multitude of different potential strategies makes for maximum replayability with new challenges every time. Sudden Storm is the second offering the ODGW's GQ III Decisions at Sea series of naval campaigns. Resulting tactical naval engagements can be fought out with any naval rules, but the campaign seamlessly interfaces with GQ III (purchased separately). In addition to background features describing the road to war, campaign level charts, OBs and campaign map; Sudden Storm contains all new color GQ III 1930s combat charts, 240 Ship Logs and 32 aircraft Formation Cards - everything needed for tactical resolution. A sheet of full-color 1937 aircraft counters on card stock is also included for those who want to resolve tactical aircraft operations, but might lack the requisite miniatures. Sudden Storm is not just another retread of Plan Orange or WW II. Politically and geographically, it presents a very different situation from either one with only two combatants confronting each other in a world defined by 1930s technologies while everyone else is determined to remain neutral. Geography, logistics and neutral zones provide gamers with tough command and operational challenges. Naval warfare is also very different in that era. Aircraft have an important role, but lack the reach and striking power another five years will bring. Surface naval forces remain the key to controlling the seas. The IJN and USN are briefly and uniquely balanced in strength at this one moment in time. Most of the modern IJN and USN ships employed in 1942 are already available, but in different, 1937 configurations. In addition, there are no magnetic torpedo exploder problems, radar or Type 93 "Long Lance" (sic) torpedoes available yet. All this creates an ideal environment for a wide range of classic naval battles. Sudden Storm also includes download access to 150 pages of Bonus Files. These include eight options, additional forces and Ship Logs, Coastal Defense Cards and maps of the defenses of Manila and Truk, individual carrier and airfield Flight Logs, separate full-color aircraft counters for the flights of each carrier and land based squadron featuring the unique color schemes of the times along with supplemental data on the forces and other aspects of this forgotten era. The files also provide opportunities to explore forgotten technologies like LTA dirigibles and the US flight deck cruiser. Sudden Storm offers you a window into the fascinating colorful, forgotten world of the late '30s filled with tough command challenges and classic naval battles. —description from the publisher
Sudden Storm: Japan vs. US, 1937 supports 2–12 players according to the catalogue. This range comes from the publisher’s listed player count, so the game can be set up for any group size within it. Some setups, rules and scoring details may still vary by player count, so check your edition’s rulebook for the exact configuration.
The listed playing time for Sudden Storm: Japan vs. US, 1937 is 120 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.
The catalogue lists Sudden Storm: Japan vs. US, 1937 for ages 12 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.
Sudden Storm: Japan vs. US, 1937 belongs to these categories: Wargame, Miniatures, and Nautical. Its main mechanics are Simulation and Scenario / Mission / Campaign Game. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.
The credited designers of Sudden Storm: Japan vs. US, 1937 are: Gregory Kuntz and L. L. Gill. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.
The catalogue lists Sudden Storm: Japan vs. US, 1937 as an expansion for General Quarters (Third Edition). Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need General Quarters (Third Edition) to use it. Check that your edition of General Quarters (Third Edition) is compatible, as some expansions were revised between editions.