Militarized interstate dispute

Militarized interstate disputes (MIDs) are conflicts between states that do not involve a full-scale war. A conflict is described as an MID if it causes fewer than 1000 deaths, and some military force is used. This can be as little as a military display of force with no deaths. Under this definition, over 2000 MIDs have been identified since 1816 in the Correlates of War project.

For example, although the 2003 invasion of Iraq by the United States-led coalition would be considered a full-scale war, the bombings and disputes related to American, British, and (until 1996) French control of the Iraqi no-fly zone in the 1990s are described by Frank Wayman as an "MID".

Some of the findings from research on MIDs:

The Correlates of War (CoW) Militarized Interstate Dispute (MID) dataset is the most extensive dataset on MIDs, and has been the basis of much of the published research on MIDs. However, a 2017 study found that the coding in the dataset was deeply flawed with significant effects on the findings of studies that relied on the dataset: "After strictly applying MID coding rules, we recommend dropping 251 cases (or over 10% of the dataset), as either we were unable to find a militarized incident in the historical record or the dispute appeared elsewhere in the data. We found evidence linking 75 disputes to other cases, and we could not identify 19 cases in the historical record. Among the remaining disputes, we recommend major changes (changes in dispute year, fatality level, and participants) in 234 disputes and minor changes in 1,009 disputes... estimates in our replications of three recent studies of dispute escalation, dispute duration, and dispute reciprocation all witness substantial changes when using corrected data—to the point of reversing previous conclusions in some cases."

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