Your obsession with Barbara Tuchman and a single dubious revisionist history aside, respected major major sources agree on the sequence of events. An example of many showing the same timeline:
Austria-Hungary’s official declaration of war on Serbia of 28 July resulted in a catastrophic chain reaction…On 1 August, Germany announced that it was at war with Russia, after having demanded the reversal of the Russian general mobilization in an ultimatum that was immediately rejected by the foreign minister in St Petersburg. A few days later, on 3 August, buoyed up on a wave of enthusiasm for war, Berlin finally also declared war on France and invaded Belgium
That lil’ old German invasion of Belgium thingy is the major sticking point in your conspiracy narrative.

However, this is getting to be a hijack. Read the book, and then start a new thread and we can debate it.
No need for a new one. There’s a Pit thread covering this and your other claims. Your fans await.