running battle
US /ˈrʌnɪŋ ˈbætl/
UK /ˈrʌnɪŋ ˈbætl/

1.
絶え間ない戦い, 長期にわたる紛争
a prolonged dispute or conflict, especially one that is intermittent or involves a series of skirmishes
:
•
The company has been engaged in a running battle with its competitors over market share.
その会社は市場シェアをめぐって競合他社と絶え間ない戦いを繰り広げている。
•
Their marriage was a running battle of wills.
彼らの結婚生活は意志の絶え間ない戦いだった。