Danish settlement continued in Mercia in 877 and East Anglia in 879—80 and 896. The rest of the army meanwhile continued to harry and plunder on both sides of the Channel, with new recruits evidently arriving to swell its ranks, for it clearly continued to be a formidable fighting force. At first, Alfred responded by the offer of repeated tribute payments. However, after a decisive victory at Edington in 878, Alfred offered vigorous opposition. He established a chain of fortresses across the south of England, reorganised the army, "so that always half its men were at home, and half out on service, except for those men who were to garrison the burhs", and in 896 ordered a new type of craft to be built which could oppose the Viking longships in shallow coastal waters. When the Vikings returned from the Continent in 892, they found they could no longer roam the country at will, for wherever they went they were opposed by a local army. After four years, the Scandinavians therefore split up, some to settle in Northumbria and East Anglia, the remainder to try their luck again on the Continent.