Vis major

A greater or superior force; an irresistible force. This term is much used iu the law of bailments to denote the interposition of violence or coercion proceeding from human agency, (wherein it differs from the "act of God,") but of such a character and strength as to be beyond the powers of resistance or control of those against whom it is directed; for example, the attack of the public quemy or a band of pirates.

See The George Shiras, 61 Fed. 300 , 9 C. C. A. 511; Brousseau v. The Hudson, 11 La. Ann. 428: Nugent v. Smith, 1 C. P. Div. 437.

In the civil law, this term is sometimes used as synonymous with "vis divina," or the act of God. Calvin.