What wepons did the vikings use in battle?

The vikings used swords and knifes. Theses swords that the vikings used were very sharp, they had jobs just to sharpen the swords because they thought that the vikings were the best out of everyone. Also, they had these huge boats. They were man powered  and if the vikings were lucky it would be windy day. Some of the vikings boats had canons on the side of the boats to fight at sea. Alot of the time canons did not work because they did not enough gun potter.

Also the vikings were very good for making and using crossbows. Crossbows could be meant for long distance or short distance. The vikings mastered this weapon by helping make them and learn how to use them correctly. But the crossbow did have a sitifect when shooting it they say that when you shoot it, it could back fire and hurt or maby even kill you.