It was one of the immediate catalysts for the Peloponnesian War.

The immediate catalyst for these reflections is the war in Bosnia.

The immediate catalyst for the changed attitude was a wave of anti-Japanese protests in Chinese cities in April.

The immediate catalyst for the formation of the National Defense Planning Commission was the Japanese invasion of Manchuria in 1931.

Mr. Gorbachev was probably the immediate catalyst for the bursting forth of democracy throughout the former Soviet empire.

However, the immediate catalyst for the dissolution of the Federation was Jamaican discontent.

The immediate catalyst for the summit was Israel's proposed diversion of water from Lake Tiberias.

The immediate catalyst for violent activity in the Fallujah area came after what many Iraqis and foreign journalists dubbed a "massacre" in Fallujah.

The immediate catalyst for the new organization was the discipline placed on a body of brethren who met to observe communion in a private home without the elders' sanction.