One single incident, one crime involving a Turk and a Greek, would ignite the whole thing.

The incident ignited a spate of protests on campus.

That incident ignited a prolonged period of turmoil that severely aggravated the already raw nerves of race relations in the city.

The incident has ignited a debate: Should the N.H.L. ban checks to the head?

The incident ignited one more round of the tribal bloodletting that has plagued this part of Africa for centuries.

This incident ignited violent protests across the country, and resulted in the issue coming before the Pakistan Parliament later the same year.

The incident ignited a national debate over the care of animals in medical research.

An incident at the local mill has ignited the African-American community: a black man is accused of stealing a bucket of nails.

This incident ignites Kagami's will to destroy Worms on his own.

This incident ignited one of the greatest tragedies in United States history, the American Civil War (1861-65).