ATI Dist;r . GENERAL s/g731 ,5 May 1.9'j'O ORIGlBAL: ENGLISH LETTER DATED 5 MAY 1970 FROM THE PERMANFJJTREPRESENTATIW OF TKE UNli?.lJEDSTATES OF.&@RI~A TO THE UNj3JED NATIONS ADDRESSED TO THE XBESIDENT OF THE SECURDY COUN0IL I have the honey Permanent Security to inform based in to refex to the letters .of 7 and 2'7 February 1965 frm the Representative of the United States of America to the President of the against tile Republic of Viet-Nam and Council concerning the aggression you of the fsllawing acts Df al-med aggression by forces af North Biet-Nam Cambodia which have required appropriate measures of collective self-defence by the armed forces of the Republic 3f America. For five years North Viet-Nnm has maintained of Vie&Nam and the United States base areas in Cambodia, against These bnses have been used in the expressed wishes af the Cambodian Government, violation of Cambodian neutraJ.i.ty as supply points and base axeas for Ki.Xitary In recent weeks North Viet-Namese operations against the Republic of Viet-Nam. of these b&se areas and expelled the forces have rapidly expanded the perimeters remaining Cambodian Government presence from the arcage The North Viet-Namese forces have moved quic1~l.y to link the bases along the bolder with South Vi@+Nam into one continuous chain a,s weU- as to push the bases deeper into Cambodia, Concurredtly, North Vi&-fiTam lt=~.asstepped up guerrilla actions into Scdb fair%-%?& and is concentrsting i.ts main f3rces in these base areas 3.n preparatim fm further massive attacks into South Viet-Nam, These military actions against the Republic and the armed forces of the United States require In his address to the American people on 30 April 70-10155 of Viet-Ram and fix armed forces appropriate defensive measures. President Nixon stated: / . . 0 ,- s/y-(31 English I?age 2 if this enemy effort succeeds, Cambodia would became a vast enemy sta'ging area and a springboard -for attacks on Ssuth Viet-Nam along bOO miles 33 frontier: a refuge where enemy trocps could return TrDrn combat wi‘thsut fear Df retaliation. 1r l . . "T!Tz%h Vie&Namese men and supplies country, je3pardizing not only the lives South Viet-Nam as well." could then be poured into ef our men but the people that of The measures of collective self-defence being taken by United States and South Vie-l;-Namese faces are Testricted in extent, pui-pose and time. They are confined to the border areas aver which the Cambodian Government has ceased to exercise any effective c=lntrol and which has been cznpletely occupied by Hsrth Viet-Namese and Viet Gong forces. Their purpxe is ta destroy “the skxks and communica$ians equipment that are being used in aL;gressiDn against the Republic of Viet-Nam. When that purpose is accomplished, our forces and those ef the Re,public 3f Viet-Nam will promptly withdraTd. These measures are limited and .Pzeportienate $3 the aggressive military operations sf the Nsrth Viet-Namese f3rces and the threat they pase. The Uni%ed States wishes ta reiterate its c.2ntinued respect for the savereignky, independcuce, neutrality and territorial integrity 3f Cambodia. Cur purpze in taking these defensive measures was stated by President Nixon, in his address of 30 April, as follows: "We take this action rick for the purpose of expanding the war into Cambodia but fez the purpose of ending the war in Viet-I\Jam and winning the just peace we all desire. "We have made and will continue to make every possible this war through negotiation at the conference table rather more fighting in the battlefield." 1 weuld request Security Council. Accept, that my letter be circulated eff~t tc, end than thraugh to the members of the etc. (Signed) Chnl-les W. YOST