Which preposition to use with morale

of Occurrences 48%

This has been repressed in the last two seasons and to-day the morale of Base Ball is of a higher type than it ever has been in the history of the pastime.

in Occurrences 8%

Of a sudden, our newspapers were filled with what appeared to be straight news dispatches dated at Amsterdam, Copenhagen, Stockholm, London, Paris, Geneva, and even Berlin, telling tales (that were not so) of starvation and disaffection in Germany, or broken morale in the German armies, and riotous demonstrations demanding peace.

by Occurrences 2%

Evidences of loss of morale by the enemy gave our men more confidence in attack and more fortitude in enduring the fatigue of incessant effort and the hardships of very inclement weather.

amongst Occurrences 1%

Whatever may have been the case later in the year, we had, however, no evidence in the spring of 1917 of deterioration of morale amongst German submarine crews, nor was there any reason for such a result.

on Occurrences 1%

Morales on being made acquainted with the cause of his detention, entered freely into the service of the prince, and gave an account to Gonsalvo of the adventures of Machin, and the situation and land-marks of the new discovered island, all of which he had learnt from certain English captives in the jails of Morocco, who had accompanied Macham, or Machin, in his expedition.

Which preposition to use with  morale