66. Ragnar's family could at any time during the 8th century conquered Scandinavia, as long as they do not die in battle... which is likely because they are Norse leaders.
67. Ragnar lost a fight before he could raid.
68. Having Vikings process a potential to form a empire quickly, reform their faith and go on a conquest spree is not only not a sigh of being overpowered but also quite normal to your eyes.
69. India was invaded by the Abbasid Caliphate around the 8th century.
70. The blood of Saxon men did not take place in a single day but days. It still however has that rocking song set to Charlemagne's conquest.