Step 1: Background of IPKF
The Indian Peace Keeping Force (IPKF) was deployed in Sri Lanka in 1987 under the Indo-Sri Lanka Accord to help maintain peace during the Sri Lankan Civil War, specifically to enforce a ceasefire between the Sri Lankan government and Tamil rebels.
Step 2: Withdrawal of IPKF
The IPKF was withdrawn from Sri Lanka in 1989 after the Sri Lankan government and Tamil rebels could not achieve a long-term resolution. The political climate and increasing domestic opposition in India also contributed to the decision for IPKF withdrawal.
Step 3: Final Answer
Therefore, the IPKF was withdrawn from Sri Lanka in 1989.