要塞砲
Coastal artillery had a greater effect on land by reinforcing defence in conjunction with army artillery. Two sets of fortress artillery made significant contributions to the early battles on the Karelian Isthmus and in Ladoga Karelia. These were located at Kaarnajoki on the Eastern Isthmus and at Mantsi on the northeastern shore of Lake Ladoga. The fortress of Koivisto provided similar support from the southwestern coast of the Isthmus.