Although the stamps did not collect interest, they were frequently redeemable for war bonds of a value equal to the contributed stamps.

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In time of conflict, national symbols are frequently used to engage the populace and enlist them in the war effort.

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Pulitzer Prize-winning historian Stanley Karnow, who covered the Vietnam War as a journalist, said American peace activists, elected officials and diplomats frequently passed through Paris in those days.

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However, like Thomas Gordon and George Finlay, who had themselves taken part in the war and from whose sympathetic, exasperated and still highly readable histories Mr Brewer frequently quotes, he presents such episodes as regrettable aberrations in a national liberation struggle.

ECONOMIST: Modern Greek history