Operation HARMONICA was an operation carried out by the United Nations Space Command Defense Force on the colony world Kobarid in 2556. The engagement comprised a multi-pronged assault by UNSC forces to surpress Insurrectionist activity in response to a string of terrorist attacks and riots throughout the colony's major population centers, including the capital city New Florence. In addition to the deployment of local armed forces, Task Group 9-Alpha, a nonpermanent subordinate of the UNSC's Ninth Fleet, to further assist in the neutralization of the ongoing civil unrest.