does the word "from" get capitalized in a title?

Yes.

so its okay is i say--

The U.S. Involvement in Vietnam From 1945-1964

Yes.

The capitalization of the word "from" in a title depends on the specific style guide or set of capitalization rules being followed. However, in general, articles, prepositions, and coordinating conjunctions are not capitalized unless they are the first or last word of the title. Therefore, "from" would usually not be capitalized unless it fits this criterion.

To ensure accuracy, it is always a good idea to consult the specific style guide being used. For example, the Associated Press (AP) stylebook does not capitalize articles, prepositions, or conjunctions unless they are the first or last word of the title, while the Chicago Manual of Style (CMS) allows for more title capitalization options. It's important to follow the guidelines of the particular style guide or organizational preference when determining the capitalization of "from" in a title.