The first Viking were in 793 AD they lived in Scandinavia (which Included Denmark , Sweden and Norway) . They attacked Britan in 1066 AD they did this , because where they come from the ground isn’t fertile enough to grow crops or to grow food , because in Scandinavia to it is very rocky. They also attacked Britan , because Britan was wealthy and they had lots of treasure for them to steal also they needed slaves to build longboats and to fight along side them.