Scenario 1)
have a warehouse of Kalashnikovs and lots of bullets, enough for an army.
go back and forth in time to 1780s, transporting said arms and ammunition
present said weapons to Tipu Sultan himself.
????
prevent the creation of British India and the creation of India by proxy.
install a new Islamic Dynasty in Delhi instead.
Scenario 2)
have ICBMS and weapons platforms, lots of them
time travel with them to 1947, at time of the first India, Pakistan war.
gift them to Jinnah
no need to elaborate what happens next.
in short, time machine going back in time>>>>>> time machine going forward in time.