Escalating military action and sanctions are forcing executives around the globe to map out scenarios to safeguard employees, supply chains and assets within and beyond the borders of Ukraine and Russia.

Carnival Corp.'s cruise ships now call in Bulgaria instead of Ukraine. McDonald's Corp. has closed its restaurants in Crimea. French airline Aigle Azur postponed plans for new flights from Paris to Beijing because Russia denied access to its airspace. Canadian snowmobile maker BRP Inc. is discounting prices for its main Russian...