If you're looking for manga similar to Musubaru Yakeato, you might like these titles.
A drama set during World War II where a submarine carrying a secret weapon attempts to stop a planned third atomic bombing of Japan.
Fall, 1943, eastern front. The story follows the 8th Panzer company as they meet the advance of the Soviet forces after the failure of Operation Citadel.
Follows artillery bombardment expert Inui and newspaper reporter Tatsumi during the events of the Siberian Intervention. The Siberian Intervention was a military expedition by the Allied Powers from 1918 to 1922. Troops from various countries including Japan were dispatched to intervene in the Russia Civil War.
In the early 20th century, a small republic found itself stuck between a kingdom and an empire—both of whom wanted to manipulate the republic to suit their own needs. In order to protect itself from both sides of the conflict, the republic created a small group of soldiers whose job it is to suppress revolution and dissent in any way possible. This is the story of the Opera House.