Excerpt from wiki: After agreeing to a ceasefire, on 7 August Georgia launched a surprise military operation to take the unrecognised Republic of South Ossetia (a breakaway region of Georgia), saying that the action is a response to separatist attacks on Georgian villages. South Ossetia denies that these attacks have occurred... On 8 August, Russia, which had troops in South Ossetia, responded by moving its troops across the border, bringing tanks and artillery into South Ossetia
You excerpt from wiki would suggest to the objective person that the beginning of offensive activities is NOT clear.
It's more like, he said -- she said, who started it.
It’s English...try reading again
“on 7 August Georgia launched a surprise military operation to take the unrecognised Republic of South Ossetia “
note post 271 re Wiki