Would Operation Sealion have succeeded? in Others Posted January 11, 2018 On 11/9/2017 at 9:47 AM, Joris said: I think it would have failed, the Germans had no invasion fleet to support the invasion and the barges they were going to use could only lead to catastrophe. That would have suited me just fine! I agree and "In the UK around six million men were mobilised, and of those just over 700,000 were killed. That's around 11.5%. In fact, as a British soldier you were more likely to die during the Crimean War (1853-56) than in WW1."