SANAA, Yemen, As war has been continuing in Yemen for two years, since a Saudi-led military intervention, observers started to argue that the goal of the military intervention became unclear, resulting in no military victory yet.

According to media reports, quoting spokesperson for the Saudi-led coalition, Ahmed Al-Asiri, the coalition has carried out 90,000 air strikes since Mar 26, 2015.

The consequences of the civil war and the air strikes are catastrophic, as the UN said that Yemen has the world's largest humanitarian crisis since 1945, besides the fact that the war has taken a huge toll on civilians.

The goal of the Saudi-led military intervention was said to be restoring the legitimacy of Yemeni's internationally recognised government, ousted by the Houthi militia, with support from forces loyal to the former president, which won't take long.

But now, as the war has been continuing for two years, no sign shows it will come to an end soon, and the government still can't resume its activities inside the country.

Adil Al-Shuja'a, a politics professor at Sanaa University, said, "The Saudi-led coalition does not have a strategic and clear goal from the war in Yemen. It seems Saudi Arabia has been focused on an ideological war with the Zaidi sect, which is controlling north Yemen, not on a war for the legitimacy of Yemen."

"Such a confusion makes Saudi Arabia sometimes think of a victory through tough demands for the Houthi-Saleh alliance including that this alliance hands over the capital Sanaa and takes a strict stance toward Iran," he added.

Al-Shuja'a saw the alliance between the General People's Congress and the Houthi group really complicated, which means Saudi demands can't be met, at least by one of the two parties of the alliance, if not both.

The Saudi-led coalition of five Gulf Cooperation Council states has been receiving logistical and intelligence support from the U.S., Britain and other western and Islamic countries.

Yaseen Al-Tamimi, a political writer and analyst, said, "Conflicting goals of member countries within the Saudi-led coalition, represent a challenge to bringing an end to the war. While the coalition should focus on retaking the capital Sanaa, some of its members have placed a bet on the coup forces and then shifted their war on factions fighting them."

The U.S. and Britain have been playing key roles in the war on Yemen, either through logistical and intelligence support or arms sales to coalition members.

Yemeni observers argued that the U.S. has been engaged in war strategies, as well as, it is backing the coalition to target and weaken factions backing the government, on allegations of their links to Al-Qaeda. "The U.S. role is one of the key reasons for failure or slowness to achieve a military victory," Al-Tamimi said.

Locally, observers said, the factions have been taking advantage of the chaos, as well as, regional and international interventions to exhaust each other.

"There is not good war planning and coordination among them. There is treason by some pro-government factions, which have been putting their own interests and interests of their political parties ahead of winning a war for the country."

Internationally, observers believe that key countries engaged in the Yemen war are now afraid of Islamists and Jihadists, who have been strengthened by the chaos.

The U.S. and Britain, are seeking to exhaust all factions, that they want the war to continue "because they will never accept that Islamists take the lead in the future."

"They will continue to fuel the war until they find a better alternative to the defeated factions."