Because of the casualties, Lind says, the United States would eventually have had to leave Vietnam anyway.
( ( Because ( ( of ( the casualties ) ) ( , ( Lind says ) ) ) ) ( , ( ( the ( United States ) ) ( ( ( would eventually ) ( have ( had ( to ( ( leave Vietnam ) anyway ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Because) (S (PP (IN of) (NP (DT the) (NNS casualties))) (, ,) (NP (NNP Lind)) (VP (VBZ says)))) (, ,) (NP (DT the) (NNP United) (NNPS States)) (VP (MD would) (ADVP (RB eventually)) (VP (VB have) (VP (VBN had) (S (VP (TO to) (VP (VB leave) (NP (NNP Vietnam)) (ADVP (RB anyway)))))))) (. .)))
Lind thought that enough soldiers would die that the US would have no choice but to leave.
( Lind ( ( thought ( that ( ( enough soldiers ) ( would ( die ( that ( ( the US ) ( would ( have ( ( ( no choice ) but ) ( to leave ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Lind)) (VP (VBD thought) (SBAR (IN that) (S (NP (JJ enough) (NNS soldiers)) (VP (MD would) (VP (VB die) (SBAR (IN that) (S (NP (DT the) (NNP US)) (VP (MD would) (VP (VB have) (UCP (NP (DT no) (NN choice)) (CC but) (S (VP (TO to) (VP (VB leave)))))))))))))) (. .)))