One department moves into a rival's responsibilities or stakeholder relationships on an operational pretext, knowing that any response the rival makes will look weak, petty, or defensive to the executives watching.
An example
Two members of a beverage company's e-commerce team turned up at the quarterly business review with its largest grocery customer. Nobody had invited them, and nothing had been handed off. They brought a proposal for retail media spending on the grocer's app, which the key account director had been negotiating separately for months. She had three options in the room: let it pass and look as if she had lost control of the account, object in front of the customer, or pitch her own plan on the spot. She let it pass, then emailed the chief commercial officer that evening. By the next leadership meeting the e-commerce lead had circulated a one-page summary of the "productive session," and the chief commercial officer asked whether retail media should sit with e-commerce for every account.
Why it works
By working visibly in the rival's space and producing something there, the attacker shows executives that their team can do the work, which makes consolidating scope under them look productive. Every response available to the rival hurts: silence reads as abdication, escalation as turf protection, a competent counter as defensiveness, and a fumble is the outcome the attacker hoped for. Meanwhile the rival has to spend capital and attention arguing for boundaries that used to be assumed. Three conditions matter: executives whose impressions decide territory, a plausible operational reason for showing up, and a rival whose responses can go wrong.
The thinking behind it
Erving Goffman Goffman's The Presentation of Self in Everyday Life (1956) treats social life as performance before an audience. A turf incursion is staged for an audience of executives whose impressions decide territory, and any response the rival gives is also a performance in front of them. The defense changes the audience: a neutral process owner and loyal stakeholders judge the incursion itself.
Thomas C. Schelling Schelling's The Strategy of Conflict (1960) explains that tacit bargains are anchored by focal points, conspicuous lines that both sides recognize, and that such lines are easier to hold than arbitrary ones. Boundaries between departments are often tacit lines of this kind. An incursion crosses one and forces the rival to argue explicitly for a boundary that held only because everyone recognized it, which is why documented ownership is the leader's remedy.
Warning signs
People from another department appear in your stakeholder meetings without an invitation or a documented handoff. They bring a deliverable and circulate a summary upward afterward. The stated reason is operational: they were asked to help, or the customer wanted a broader view. The timing falls before planning or budget season. Your stakeholders start asking who owns the relationship.
How to defend yourself
Decline the response the incursion is designed to provoke.
- Stay calm in the room, and afterward take the dispute to a neutral process owner: whoever governs account ownership, a planning council, or the chief operating officer's office.
- Make the incursion itself the subject: ask, in that forum, who invited whom and under what handoff.
- Let your stakeholders speak. A customer or partner who says they want to keep working with you is the strongest answer.
- Keep doing the work well and keep a record of the dates.
A rival with strong stakeholder loyalty can turn the incursion into the story, and observers often read a manufactured provocation as a sign of the attacker's character.
How a leader shuts it down
Write down who owns each major stakeholder relationship and require documented handoffs before anyone else joins. When a team produces a deck showing it can do another team's job, ask whether it was invited. Judge the conduct of the incursion along with the response to it, or you will reward the provocation.