Mission Creep
The gradual, incremental expansion of a military operation's scope beyond its original mandate, through sequential small escalations each of which seems individually justified, producing entanglement far deeper than the initial political intent, as illustrated by Vietnam (1965: 23,000 advisors; 1968: 543,000 troops) and Afghanistan (2001: limited counterterrorism; 2009: full counterinsurgency).
Mission creep operates through the ratchet mechanism: each step makes the next step harder to refuse. If you have already committed 1,000 troops and the mission is failing, pulling them out looks like defeat. Sending 2,000 more looks like measured resolve. The logic repeats at 2,000, 4,000, 10,000. At each stage, the cost of escalation (adding more troops) appears lower than the cost of withdrawal (admitting the previous commitment was wasted). This is the sunk cost fallacy institutionalized as military policy.
The mechanism has structural features beyond individual psychology. Military organizations generate internal momentum: careers advance through wars that continue, not wars that end; intelligence assessments systematically overstate enemy vulnerability to justify continued engagement; each new commander arrives wanting to 'make a difference' before the next rotation. These institutional incentives ensure that the initial deployment decision is the last truly deliberate one, all subsequent decisions are locked in by logic chains that began with the first 1,000 troops.
Predictive History's application to the US-Iran scenario: the question is not whether ground troops will be used, but when. The air campaign logic almost inevitably generates demands for ground forces to 'hold what the bombers win.' Once ground troops are committed, the national draft follows. The Law of Escalation means that the decision to bomb Iran was already a decision to potentially draft American 18-year-olds, the political leaders just did not announce it that way.
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What is mission creep and why is it so hard to stop? ＋
Mission creep is incremental military expansion where each small escalation makes the next one easier to justify and harder to refuse. The sunk cost fallacy drives it: pulling out looks like defeat, so you escalate to avoid admitting previous commitment was wasted. Vietnam grew from 23,000 advisors (1965) to 543,000 troops (1968) through this ratchet mechanism. Each step individually seemed rational; the total was catastrophic.