"It is likely that Johnson himself believed an attack against American warships had taken place. Yet there can be little doubt that he responded to the possibility of such an attack with stunning alacrity. No one suggested waiting a bit, probing Hanoi's intentions, or seeking mediation. Whatever happened in the Gulf of Tonkin, its successful presentation to Congress and the public as an overt act of Hostility by Hanoi was precisely what Johnson's advisers had told him he needed: a way to justify direct American participation in the war". - Marilyn Young
Diem; Chalabi. The Gulf of Tonkin "incident", anti-communist ideology, an existing agenda for war, The Gulf of Tonkin Resolution; WMDs, Yellowcake, Chemical and Biological weapons, neo-con ideology, the Project for a New American Century, the Iraq Resolution. War.
So is the Bush doctrine (unbeknownst to Sarah Palin) actually a refabrication of the Johnson doctrine?
Johnson's white house actively sought after something, albeit true or not, that could garnish public support and approval for an existing agenda of military expansion in Vietnam. Similarly, the Bush white house seems to have waited for an excuse to invade Iraq. In 1998 Donald Rumsfeld (later, Bush's Secretary of Defense), Paul Wolfowitz (later, Deputy Secretary of Defense), and Robert Zoellick (President of the World Bank), of the neo-conservative think tank, the Project for a New American Century, wrote an open letter to President Bill Clinton professing their neo-con ideology for a global Pax Americana, strategically beginning with military aggression in Iraq.
WMDs (that never existed) were one of many fallible reasons Bush cited for a preemptive war against Iraq. The Gulf of Tonkin incident (which never happened) provided Johnson with a publicly acceptable reason for the preemptive war with Vietnam. Johnson's war can be referred to as preemptive after closely examining at his motives for increasing military presence in Vietnam, embodied by anti-communist ideology. Bush's motives for war with Iraq seem to be embodied by neo-con ideology.
So what did we learn about going to war from our military excursion in Vietnam?
Nothing that is not being learned all over again in Iraq.