D&D departs from traditional wargaming and assigns each player a specific character to play instead of a military formation. These characters embark upon imaginary adventures within a fantasy setting. A Dungeon Master serves as the game's referee and storyteller, while maintaining the setting in which the adventures occur and playing the role of the inhabitants. The characters form a party that interacts with the setting's inhabitants (and each other). Together they solve dilemmas, engage in battles and gather treasure and knowledge.^[4] In the process the characters earn experience points to become increasingly powerful over a series of sessions.

The early success of Dungeons & Dragons led to a proliferation of similar game systems. Despite this competition, D&D remains the market leader in the role-playing game industry.^[5] In 1977, the game was split into two branches: the relatively rules-light game system of Dungeons & Dragons and the more structured, rules-heavy game system of Advanced Dungeons & Dragons (abbreviated as AD&D or ADnD).^[1][2][6] AD&D 2nd Edition was published in 1989. In 2000, the original line of the game was discontinued and the AD&D version was renamed Dungeons & Dragons with the release of its 3rd edition with a new system. These rules formed the basis of the d20 System which is available under the Open Game License (OGL) for use by other publishers. Dungeons & Dragons version 3.5 was released in June 2003, with a (non-OGL) 4th edition in June 2008.^[7][8] A 5th edition was released during the second half of 2014.^[9]

As of 2004, Dungeons & Dragons remained the best-known^[10] and best-selling^[11] role-playing game, with an estimated 20 million people having played the game and more than US$1 billion in book and equipment sales.^[12] The game has been supplemented by many pre-made adventures as well as commercial campaign settings suitable for use by regular gaming groups. Dungeons & Dragons is known beyond the game for other D&D-branded products, references in popular culture, and some of the controversies that have surrounded it, particularly a moral panic in the 1980s falsely linking it to Satanism and suicide.^[13] The game has won multiple awards and has been translated into many languages beyond the original English.
- Taken from (https://en.wikipedia.org/wiki/Dungeons_%26_Dragons)

The core of D&D is storytelling. You and your friends tell a story together, guiding your heroes through quests for treasure, battles with deadly foes, daring rescues, courtly intrigue, and much more. You can also explore the world of Dungeons & Dragons through any of the novels written by its fantasy authors, as well as engaging board games and immersive video games. All of these stories are part of D&D.

In 1956 rival company DC Comics ushered in the so-called Silver Age of comics by reintroducing superhero titles with significant commercial success. In the early 1960s Atlas changed its name to Marvel Comics. For several decades Marvel and DC were the top companies in the industry. Throughout the 1980s and ’90s Marvel changed hands numerous times, becoming a publicly held company in 1991. Questionable management decisions and a general slump in sales in the comic book industry drove Marvel Comics into bankruptcy in 1996. The company emerged from bankruptcy in 1998 and began to diversify its output, launching imprints aimed at a variety of demographics and expanding its cinematic offerings under the Marvel Studios banner. In 2007 Marvel began publishing digital comics. In 2009 the Walt Disney Company purchased the parent company of Marvel Comics.

The shared storytelling palette known as the Marvel universe was unveiled in 1961, when Goodman responded to the growing interest in superhero books by commissioning writer Stan Lee and artist Jack Kirby to create the Fantastic Four. With the release of Fantastic Four no. 1 (November 1961), readers were introduced to a superheroic setting that was, nevertheless, rooted in the real world. Lee and Kirby attempted to make their comic book characters more original by allowing them to interact with each other in a realistic fashion, including heroes often fighting or arguing with each other. This trend continued with a flood of other superhero characters introduced by Marvel Comics during the early 1960s, including Spider-Man, the Incredible Hulk, and the X-Men. Lee wrote the majority of Marvel’s books during that time, and Jack Kirby and Steve Ditko were the most important and influential artists.

-Taken from ( https://www.britannica.com/topic/Marvel-Comics )

Most of Marvel's superheroes and super villains usually operate or were born in cities or countries (whether they be real or fictional) these locations are:

-Taken from (http://marvel.wikia.com/wiki/Marvel_Comics )