Which preposition to use with rearguards

of Occurrences 11%

He had then returned to serve in New York, and had stayed there to the bitter end, because there was no other man whom the new government would trust to command the rearguard of the Empire in retreat.

in Occurrences 2%

I was on rearguard, a nuisance at the best of times, as any check at the head of the column acts on the rearguard in increasing ratio to the length of the column, so a good deal of time is spent in wondering why the dickens they don't get on in front.

along Occurrences 1%

In this quarter of the field our forces, which had now been reinforced, pushed on in a northeasterly direction in co-operation with the advance of the French Fifth Army to the north and of the French Sixth Army to the eastward against the German rearguard along the River Ourcq.

for Occurrences 1%

"I got into my slippers, and reached down an old sword bayonet from the wall; then I picked up my candle, and begged my mother not to come; but I knew it would be little use, if she had made up her mind; and she had, with the result that she acted as a sort of rearguard for me, during our search.

on Occurrences 1%

"On Monday, the 14th, those of our troops which had on the previous day crossed the Aisne, after driving in the German rearguards on that evening, found portions of the enemy's forces in prepared defensive positions on the right bank and could do little more than secure a footing north of the river.

without Occurrences 1%

The troops were called upon to carry out very long marches in great heat without water, to make attacks on stubborn rearguards without time for reconnaissance, and finally to suffer cold and privation in the mountains.

Which preposition to use with  rearguards