YOU SAID:
People fight hardest on their own soil.
INTO JAPANESE
人々は自分の土地で最も激しく戦っています。
BACK INTO ENGLISH
People are fighting the hardest in their land.
INTO JAPANESE
人々は自分たちの土地で最も激しい戦いをしています。
BACK INTO ENGLISH
People are fighting the hardest in their land.
That didn't even make that much sense in English.