Offensive operations will still rely upon outside support for air power, intelligence and logistics.

BBC: Can France achieve its goals in Mali?

Coalition forces have been providing air support and intelligence, but the offensive is the first real test of the Iraqi security services.

NPR: Clashes with Militants Test Iraqi Security Forces

The BBC's Ian Pannell, who is travelling with UK troops in Helmand, says the latest phase of the offensive involves a major land assault, with soldiers backed up by artillery and air support.

BBC: UK forces launch Taliban assault