Microscopic lesions are primarily endothelial hypertrophy and mononuclear cell infiltrations consistent with an immune response. They undertook frequent live fire exercises, many at night, simulating raids, ambushes and infiltrations. At first, the infiltrations and border transgressions took the form of petty banditry and thievery. Missions vary from assaults, infiltrations, recon to defending bases or convoy escorts. The playing styles range from head-on assaults to stealthy infiltrations and assassinations. Most of the ground attacks were infiltrations and shootings. As such, the Troops were concentrating on the tasks of preventing espionage infiltrations. The lesions are due to diffuse infiltrations of the skin by malignant pDC. These infiltrations, which may involve the liver's bile ducts, often contained lymphoepithelial lesions. Along the 1949 armistice line, infiltrations, armed or otherwise, were frequent from both sides. They are highly disturbed by the terrorists' infiltrations. Throughout 1960, Indonesian armed forces launched several infiltrations into West New Guinea. Southern bases on each coasts are used to organize infiltrations into South Korea and Japan. Initial infiltrations were noticed in Kargil in early May, 1999. The artillery of the 2d DINA could not completely check enemy infiltrations.