The North Koreans had not been expecting an invasion at Inchon. After the storming of Green Beach, the KPA assumed (probably because of deliberate American disinformation) that the main invasion would happen at Kunsan. As a result, only a small force was diverted to Inchon. Even those forces were too late, and they arrived after the UN forces had taken Blue Beach and Red Beach. The troops already stationed at Inchon had been weakened by Clark's guerrillas, and napalm bombing runs had destroyed key ammunition dumps. In total, 261 ships took part.