OD&D's Wilderness Rules

OD&D's wilderness game is much smaller than people think it is. The rules that exist only cover movement, setting up encounters, and evasion. The encounter charts have a large number of monsters, too large to actually fight using the Alternate Combat System from Book 1. When encountering monsters in the Wilderness of OD&D, it seems expected that the players would switch over to a set-piece battle using the Chainmail rules.  OD&D's wilderness adventuring can basically be seen as a sketch of rules for using a hex map and random monster battles with the Chainmail miniatures game.