Which preposition to use with generalissimo

of Occurrences 22%

With a kind of theatrical sincerity he made successive public appearances as War Lord or William the Peaceful, as Artist, Poet, Architect, Biblical Critic, Preacher, Commercial Magnate, Generalissimo of land forces and Creator of a World Navy; and with Whitman he might well have said, "I can resist anything better than my own diversity.

in Occurrences 1%

In the south Sun Yat-sen had been elected generalissimo in 1921.

with Occurrences 1%

" Perry dashed off, followed by a score of Dunderbunk boys, organized by him as the Purtett Guards, and taught to salute him as Generalissimo with military honors.

Which preposition to use with  generalissimo