Taylor's 1961 Assessment Mission Report to President Kennedy
From the Historian of the State Department
http://www.state.gov/www/about_state/history/vol_i_1961/u.html (Doc. #210)

In 1961, Kennedy sent Taylor to South Vietnam to assess the situation. Taylor and his team wrote an extensive report, recommending a deeper involvement of the U.S. (especially the military) in South Vietnam. Taylor proposed sending 8,000 combat troops, under the pretext of flood relief assistance. One of the jobs of these units would be "...[to] conduct such combat operations as are necessary for self-defense and for the security of the area in which they are stationed."

April 14, 1965 telegram opposing further deployments of U.S. combat troops
From the Historian of the State Department
http://www.state.gov/www/about_state/history/vol_ii/241_260.html (Doc. #252)

Taylor, already Ambassador in Saigon, writes the State Department to express his opposition to more troop deployments. On April 17, Taylor sent another telegram to McGeorge Bundy in which he deplores the decision to "militarize" further the scope of the mission in Vietnam, adding that such a move would be "[...]disastrous in its likely effects upon pacification[...] (same page, Doc. #258)

Taylor assesses Thieu's and Ky's Government
From the Historian of the State Department
http://www.state.gov/www/about_state/history/vol_iii/001.html (Doc. #9, bottom of page)

Telegram from Ambassador Taylor in Saigon to the State Department in which he assesses the perspectives for the new Thieu-Ky government. Taylor shows concern for the political instability and the ongoing Viet Cong offensive.

Letter from Ambassador Taylor to Nguyen Cao Ky
From the Historian of the State Department
http://www.state.gov/www/about_state/history/vol_iii/030.html (Doc. #37)

Ky, Thieu and the other young officers that ousted Khanh were increasingly upset with Taylor. General Taylor showed little diplomatic skill in his dealings with the South Vietnamese leadership, being at times insensitive to their domestic situation, and sometimes outright patronizing. In this letter, dated July 1, 1965, Taylor dictates in humiliating detail what course of action the U.S. expects from the Vietnamese Government.