Eastern bits of Ukraine have very large untapped stores of hydrocarbons. It is unknown what exactly were/are the goals for the ongoing invasion (assuming there

Eastern bits of Ukraine have very large untapped stores of hydrocarbons. It is unknown what exactly were/are the goals for the ongoing invasion (assuming there are any plausible ones in the first place) but one of the more reasonable guesses is denying Ukraine access to those stores in order to maintain russian supremacy in providing cheap gas and oil to Germany etc. both as a source of revenue and a political tool.