2 grammar, punctuation, typos
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Because Finland was never a puppet state  ,it it was one of the axisAxis countries  .Red army The Red Army invaded Finland in 1941  . Secondly,In in 1941 there were highs and lows between Nazi Germany and soviet russia Soviet Russia. Thirdly  , the Red armyArmy came near the east polishPolish border  . Fourthly  , when greeceGreece and yugosloviaYugoslovia were invaded by third reich the Third Reich,soviets the Soviets supported greeceGreece and yugosloviaYugoslovia and aided them .

Because Finland was never a puppet state  ,it was one of the axis countries  .Red army invaded Finland in 1941  . Secondly,In 1941 there were highs and lows between Nazi Germany and soviet russia . Thirdly  , Red army came near the east polish border  . Fourthly  , when greece and yugoslovia were invaded by third reich ,soviets supported greece and yugoslovia and aided them .

Because Finland was never a puppet state, it was one of the Axis countries. The Red Army invaded Finland in 1941. Secondly, in 1941 there were highs and lows between Nazi Germany and Soviet Russia. Thirdly, the Red Army came near the east Polish border. Fourthly, when Greece and Yugoslovia were invaded by the Third Reich, the Soviets supported Greece and Yugoslovia and aided them .

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Because Finland was never a puppet state ,it was one of the axis countries .Red army invaded Finland in 1941 . Secondly,In 1941 there were highs and lows between Nazi Germany and soviet russia . Thirdly , Red army came near the east polish border . Fourthly , when greece and yugoslovia were invaded by third reich ,soviets supported greece and yugoslovia and aided them .