How useful would Bearn have been if she remained Allied and joined the defense of Singapore and the ABDA area?
Short answerHer slow speed limited fleet work, but her fighters, torpedo aircraft, and reconnaissance could significantly strengthen a combined Allied defense if she arrived before the collapse.
NotesThe slow French carrier could still carry aircraft such as Buffalo fighters and Swordfish and provide valuable reconnaissance. Moving her to Singapore before France fell would place that aviation where Allied forces badly lacked persistent scouting and cover. Her value rises further in a counterfactual that also preserves a second Ark Royal, Saratoga, or Force Z. Bearn would not become a fast fleet carrier, but as part of a combined defense she could materially alter information, air protection, and the timing of Japanese attacks.