Attributes of National Alliance Membership and War Participation, 1815-1965

Article defines the attributes of national alliance membership which tend to be associated with war participation.
Their results show that nations will be more apt to join their allies in a war when;
1)      Many of their allies are in the war,
2)      The allies they join are minor powers
3)      They have relatively few alliance partners,
4)      The alliance in question is a defensive one,
5)      The alliance is relatively new,
6)      They have a large number of alliances.
As a nation’s distinct alliance commitment increases, the number of directions in which that nation may be pulled also increases.
Some alliances served to pull nations into war coalitions, a nation’s choice between entries or non-entry could well be influenced by alliance attributes themselves.