Which preposition to use with unassisted

against Occurrences 2%

None but the first names can stand unassisted against the attacks of time; and if men raised to reputation by accident or caprice, have nothing but their names engraved on their tombs, there is danger lest, in a few years, the inscription require an interpreter.

to Occurrences 2%

Stepping unassisted to the ground she looked around her in bewilderment.

by Occurrences 1%

I am of opinion that, unassisted by further evidence, the Ricordo, in spite of its date, will not bear out Gotti's view that Michelangelo sought Venice on a privy mission at the end of August 1529.

beneath Occurrences 1%

Twelve thousand old men, women, and children were thus expelled, and died either round the place or whilst roving in misery over the neighboring country; "poor women gave birth unassisted beneath the walls, and good compassionate people in the town drew up the new-born in baskets to have them baptized, and afterwards lowered them down to their mothers to die together."

Which preposition to use with  unassisted