General Rochambeau helped General Washington by providing French troops for the Battle of Yorktown.
attacking General Gates at the Battle of Camden.
attacking General Greene at the Battle of Guilford Court House.
providing British ships for the Battle of Camden.

four sitting presidents have been assassinated while in office but the first was abraham lincoln,

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.