Conjuncture

Con`junc´ture

n.	1.	The act of joining, or state of being joined; union; connection; combination. The conjuncture of philosophy and divinity. - Hobbes. A fit conjuncture or circumstances. - Addison.
	2.	A crisis produced by a combination of circumstances; complication or combination of events or circumstances; plight resulting from various conditions. He [Chesterfield] had recently governed Ireland, at a momentous conjuncture, with eminent firmness, wisdom, and humanity. - Macaulay.

Noun

conjuncture - a critical combination of events or circumstances