who all take part in this?
Sauron's army, armies of Gondor and Rohan.
Battle of the Pelennor Fields
Sauron's army from Minas Morgul, led by the Witch-king of Angmar (chief of the Nazgûl) greatly outnumbered the combined armies of Gondor and its allies. This army consisted of some 150,000 orcs, trolls, and Men who had allied with Sauron. Sauron's forces included Haradrim Southrons who brought elephantine beasts, Easterlings from Rhûn and Variags from Khand, and many Orcs and Trolls. Tolkien describes the army as the greatest to "issue from that vale since the days of Isildur's might, no host so fell and 
where is rohan in lord of the rings It is bordered to the north by the Fangorn forest, to the northeast are the walls of Emyn Mui, to the east are the mouths of the River Entwash, and the Mering Stream, to the south lie the White Mountains and to the west are the rivers Adorn and Isen. how did it get it's name? Tolkien used Old English for the kingdom's language and names. which is it's capital city? Edoras. which language is spoken there? Rohirric or Rohanese. has it appeared in any form of art? UNANSWERABLE what kind of people can we find here? They have an Anglo-Saxon culture and language, with Gothic attributes. what different animals can be seen here? Horses. did the place witness any war? Yes, the Battle of the Pelennor Fields. when did it happen? UNANSWERABLE
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Battle of the Pelennor Fields [SEP] Participants
Sauron's army from Minas Morgul, led by the Witch-king of Angmar (chief of the Nazgûl) greatly outnumbered the combined armies of Gondor and its allies. This army consisted of some 150,000 orcs, trolls, and Men who had allied with Sauron. Sauron's forces included Haradrim Southrons who brought elephantine beasts, Easterlings from Rhûn and Variags from Khand, and many Orcs and Trolls. Tolkien describes the army as the greatest to "issue from that vale since the days of Isildur's might, no host so fell and strong in arms had yet assailed the fords of Anduin; and yet it was but one and not the greatest of the hosts that Mordor now sent forth." The defenders' numbers were considerably less.