In general we think of Corporations as not acting on nations with force, simply with legal power. (Perhaps they maintain a fleet of security guards). We generally think of Corporations as leaving the military work to the government.
(Not to say that the Corporations can't influence the government strongly for a particular military outcome - but the idea was they'd leave it to the government armed forces to take this action.)
Yet when we read the history of the British East India Company, we read about the Presidency Armies. It does appear that a private Corporation in that period of history maintained an armed force for interacting with nations.
In fact we read:
The Brigade of Gurkhas is the collective term for units of the current British Army that are composed of Nepalese soldiers. The brigade, which is 3,640 strong, draws its heritage from Gurkha units that originally served in the Indian Army prior to Indian independence, and prior to that of the East India Company.
My question is: Is there a precedent for private companies maintaining a military force?