how far is a mike in military terms

In military terms, a "mike" typically means a minute. The term "mike" comes from the military phonetic alphabet where "Mike" represents the letter M, and is used as shorthand for "minutes." For example, saying "five mikes" means five minutes. This usage is common in radio communications where brevity and clarity are important. Additionally, "mike" can have other meanings depending on context, such as referring to millimeters (e.g., "40 mike-mike" for a 40mm grenade launcher). But when referring to time or distance in terms of time, "mike" equals a minute.