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Document and Entity Information
May 20, 2025
Document And Entity Information [Line Items]  
Document Type 8-K
Document Period End Date May 20, 2025
Entity Registrant Name ARMADA ACQUISITION CORP. II
Entity Incorporation State Country Code E9
Entity File Number 001-42661
Entity Tax Identification Number 98-1815892
Entity Address Address Line 1 1760 Market Street
Entity Address Address Line 2 Suite 602
Entity Address City Or Town Philadelphia
Entity Address State Or Province PA
Entity Address Country US
Entity Address Postal Zip Code 19103
City Area Code 212
Local Phone Number 543-6886
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Current Fiscal Year End Date --12-31
Amendment Flag false
Entity Central Index Key 0002044009
Capital Units [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Units, each consisting of one Class A ordinary share, par value $0.0001 per share, and one-half of one redeemable warrant
Trading Symbol AACIU
Security Exchange Name NASDAQ
Capital Unit, Class A [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Class A ordinary shares, par value $0.0001 per share, included as part of the units
Trading Symbol AACI
Security Exchange Name NASDAQ
Warrant [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Warrants included as part of the units, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Trading Symbol AACIW
Security Exchange Name NASDAQ