Leaders of the Group of Seven economic powers are set to commit themselves to the long haul in supporting Ukraine as they meet in the German Alps and confer by video link with Ukrainian President Volodymyr Zelenskyy.

The G-7 leaders will begin Monday’s session of their three-day summit with a focus on Ukraine. Later, they will be joined by the leaders of five democratic emerging economies — India, Indonesia, South Africa, Senegal and Argentina — for a discussion on climate change, energy and other issues, AP reported.

The war in Ukraine was already at the forefront of the G-7 leaders’ minds as they opened their summit at the secluded Schloss Elmau luxury hotel on Sunday — just as Russian missiles hit the Ukrainian capital of Kyiv for the first time in weeks.

U.S. President Joe Biden said Russian President Vladimir Putin “has been counting on, from the beginning, that somehow NATO and the G-7 would splinter, but we haven’t and we’re not going to.” Britain’s Boris Johnson warned the leaders not to give in to “fatigue.”

On Monday, they have the opportunity to demonstrate that unity to Zelenskyy and reaffirm their commitment to supporting Kyiv financially and otherwise, AP reported.

Biden hopes to use his trip to Europe to proclaim the unity of the coalition pressing to punish Russia for its invasion of Ukraine as much as he is urging allies to do even more — seeking to counter doubts about its endurance as the war grinds into its fifth month.

The summit’s host, German Chancellor Olaf Scholz, said last week that he wants to discuss the outlines of a “Marshall plan for Ukraine” with his G-7 counterparts, referring to the U.S.-sponsored plan that helped revive European economies after World War II.

With the war still in progress and destruction mounting by the day, it’s unlikely to be a detailed plan at this stage. Scholz has said that “rebuilding Ukraine will be a task for generations.”

The G-7 already is committed to help finance Ukraine’s immediate needs. Finance ministers from the group last month agreed to provide $19.8 billion in economic aid to help Kyiv keep basic services functioning and prevent tight finances from hindering its defense against Russian forces, AP reported.