anasalhajj/Shutterstock Yemen has been a less bloody place since last year’s cease-fire, despite its expiry in October, but recent weeks have seen some dangerous developments.A return to all-out war remains a real prospect — both between a Riyadh-led coalition and the rebel Houthi movement, and within the anti-Houthi alliance.An uptick in attacks by Islamic State and Al-Qaeda raises concerns about potential threats to the region’s critical oil trade and infrastructure. Save for later Print Download Share LinkedIn Twitter Saudi Arabia's influence in Yemen is being challenged on different fronts — and how Riyadh manages this will help shape the security outlook on the Arabian Peninsula. Tensions between the rebel Houthi group and the Saudi-backed government in Yemen have been steadily ramping up: Saudi-Houthi talks failed earlier this year, and exports were cut off after a Houthi missile hit the Ash Shihr oil terminal following the expiry of the cease-fire in place between April and October, leaving the government even more financially dependent on Riyadh. Adding to this, fractures within the anti-Houthi alliance appear to be widening again.