What Is the War Simulator, and How Does It Actually Work?
2026-09-03 · by Jordi Fuster
Of everything on WorldRelat, the War Simulator is probably the feature that gets shared the most — and the one most likely to be misunderstood. So here's a straight explanation of what it does, what data actually drives it, and, just as importantly, what it doesn't claim to know.
The idea
You pick two teams — each one can be a single country or a small alliance of several — and the simulator estimates each side's chances of coming out ahead. There's no dice roll, no random battle log: it's a transparent calculation built from real, published figures about each country involved, combined into a single "power factor" per side.
What actually goes into the number
Four things, per country, feed into the model: military expenditure, GDP, population, and active-plus-reserve military personnel. Those get combined into a power score for each team, and the simulator also breaks military spending down further into an estimated land/air/naval split, so a result doesn't just say "Team A wins" — it shows a per-country breakdown of what each side is actually bringing to the comparison: economic weight, manpower, hardware budget, and how that budget is roughly distributed across the three traditional branches.
Every one of those inputs is a real, sourced figure — mostly from World Bank data, refreshed roughly once a year, the same cadence the source data itself updates on. There's nothing invented or estimated beyond the disclosed military-branch split, which is explicitly labeled as an estimate rather than an official figure, because no government publishes an exact land/air/naval breakdown of its budget.
What it deliberately leaves out
This is the important part. The simulator has no model of terrain, weather, morale, alliances triggering outside the two teams you picked, nuclear deterrence, logistics, or the thousand other things that decide real conflicts. It's a comparison of measurable national capacity — not a war-gaming engine, and not a prediction. Two countries with similar GDP and military spending can have wildly different real-world outcomes in an actual conflict, for reasons no spreadsheet captures. The FAQ page is blunt about this for a reason: the scenarios are built from open data but aren't meant to represent reality, and using the tool isn't an endorsement of any conflict, hypothetical or otherwise.
Try it as a "what if", not a forecast
The most interesting way to use it isn't "who would win" between two obvious rivals — it's picking mismatched teams and seeing exactly which factor is doing the work. Put a small, wealthy country up against a much larger but poorer one, or stack a handful of mid-sized economies against a single superpower, and the per-country breakdown usually tells a more interesting story than the headline result does. That breakdown — not the winner — is really the point of the tool.