EU5 Annex Union Guide | Europa Universalis 5
Original Guide by GamerBlurb.com | Published on 11/08/2025 at 12:01 AM CST
Annexing a personal union in Europa Universalis 5 is confusing right now. Some players see no button at all, others report a dead end. Here is the clean truth and what you can do that actually works.
Can you annex a union partner right now
Personal unions do not annex like vassals. There is no standard annex button in subject actions, and many runs show no working path to force annex the junior. Some nations may have special events or laws, but if you do not see a clear option, annexing the PU is not available in your game state.
What you should do instead
Treat the union as a long term subject. Keep the junior loyal, stack prestige and legitimacy, and build strength until a specific event or law appears in your run. If nothing shows up, play around the union rather than into it.
Keep the union loyal
High legitimacy and prestige keep liberty desire low. Strong army and navy deter outside meddling. Use improve relations on the junior when needed.
Grow your core first
Expand with vassals and direct conquest. Save admin and diplo for things that always work, like integrate province, separate peace deals, and subject annexation for normal vassals.
Use vassals for guaranteed annexation
Vassals have a clear annex flow through diplomacy. If your goal is direct control of land on a timer you set, create vassals and annex them later. Leave the PU as a power multiplier while you grow.
How to verify your options in a save
Open diplomacy on the junior. If you only see subject interactions and no annex or integrate path, there is no annex right now. Check your country overview, look for a unions or organisations screen. If there are no union integration laws visible, you cannot progress annexation in this run.
When an event or law appears
If your nation gets a union specific law chain or a national event, follow its rules. Some require high prestige, set stability, or a cooldown before the next step. If the law is missing, there is nothing to click, move on.
Final Blurb
EU5 unions are not vassals. If the annex path does not exist in your save, accept the union for its value, and focus annex efforts on vassals that you can actually absorb. Stay strong, stay stable, and let the junior carry its weight while you build a real core.
FAQ
Where is the annex button for a union
If you do not see it in diplomacy or in organisations, there is no annex action available in that save.
Do unions ever merge on their own
Only if your nation has a specific event or a law chain that appears in your run. If you never see it, they do not merge.
Can I annex a vassal instead
Yes, vassals annex through subject actions after ten years with high opinion. This is the reliable path.
Is it a bug if I cannot annex my PU
Players report missing options, and some suspect bugs. If you cannot find a clear union path, plan as if annex is not possible.
What stats should I keep high for unions
Prestige, legitimacy, stability, and military strength, these keep the junior loyal and useful even without annexation.
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