Final answer:
The Tamil Tigers waged a 25-year civil war with Sri Lanka.
Step-by-step explanation:
The Tamil Tigers waged a 25-year civil war with Sri Lanka. The Tamil Tigers, also known as the Liberation Tigers of Tamil Eelam (LTTE), fought against the Sinhalese government in Sri Lanka. This civil war resulted in the deaths of thousands of people and had a significant impact on Sri Lanka's tourism industry and foreign investments.