The army had launched a major offensive on the South-West front which was a disaster.
The significance of this is that it contravened the previous agreement to fight a defensive war.
The standing of the PG took a serious blow.
Prince Lvov stood down and was replaced by Kerensky.
There was a series of demonstrations and protests nicknamed the "July Days".
It is unclear how much of a role the Bolsheviks played in organising these demonstrations but many of the protestors carried banners with Bolshevik slogans on.
The July Days were put down fairly easily.
As a result of the government crackdown that followed, many leading Bolsheviks including Lenin were forced to go into hiding to avoid arrest.
The Bolsheviks denied being behind this failed uprising though others such as the Mensheviks claimed they were.