After the fall of the Dybbol fortifications, the Prussians attacked the important defensive position of Als in the southeastern part of Jutland on June 29, 1864. The Danes were once again outnumbered, and the Prussians quickly gained control of the island. After the battle, the Danes retreated further into Jutland, and were not able to resist effectively and sought a peace settlement. Also other European powers, such as Great Britain and Russia, were concerned about the balance of power and sought to mediate an end to the war.